All Stories

  1. Effects of Profortil® on Leptin-Induced Adverse Effects on Sperm Parameters in Sprague-Dawley Rats

    Article • Andrologia, March 2024, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  2. Black Tea Aqueous Extracts Improve Human Sperm Functions: An In Vitro Study

    Article • Andrologia, December 2023, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  3. Improvements in Sperm Motility Following Low- or High-Intensity Dietary Interventions in Men With Obesity

    Article • The Journal of Clinical Endocrinology & Metabolism, September 2023, Endocrine Society

    Professor Ralf Reinhold Henkel

  4. Role of oxidative stress in male infertility

    Article • Reproduction and Fertility, June 2023, Bioscientifica

    Professor Ralf Reinhold Henkel

  5. Targeted Amino Acids Profiling of Human Seminal Plasma from Teratozoospermia Patients Using LC–MS/MS

    Article • Reproductive Sciences, June 2023, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  6. The Impact of COVID-19 Vaccines on Male Semen Parameters: A Retrospective Cohort Study

    Article • Andrologia, February 2023, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  7. Predictive value of seminal oxidation-reduction potential analysis for reproductive outcomes of ICSI

    Article • Reproductive BioMedicine Online, November 2022, Elsevier

    Ramadan Saleh, Professor Ralf Reinhold Henkel

  8. Green tea (Camellia sinensis) aqueous extract improved human spermatozoa functions in vitro

    Article • Journal of Medicinal Plants for Economic Development, October 2022, AOSIS Open Journals

    Professor Ralf Reinhold Henkel

  9. ANXA2,SP17,SERPINA5,PRDX2genes, and spermDNAfragmentation differentially represented in male partners of infertile couples with normal and abnormal sperm parameters

    Article • Andrologia, August 2022, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  10. Effect of redo varicocelectomy on semen parameters and pregnancy outcome: An original report and meta‐analysis

    Article • Andrologia, July 2022, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  11. Reply to Pallotti et al. Comment on “Boitrelle et al. The Sixth Edition of the WHO Manual for Human Semen Analysis: A Critical Review and SWOT Analysis. Life 2021, 11, 1368”

    Article • Life, July 2022, MDPI AG

    Ramadan Saleh, Professor Ralf Reinhold Henkel

  12. In vitro effects of aqueous extract of unfermented rooibos on human spermatozoa

    Article • Andrologia, May 2022, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  13. Oxidative Stress and Assisted Reproduction: A Comprehensive Review of Its Pathophysiological Role and Strategies for Optimizing Embryo Culture Environment

    Article • Antioxidants, February 2022, MDPI AG

    Ramadan Saleh, Professor Ralf Reinhold Henkel

  14. Comprehensive Analysis of Global Research on Human Varicocele: A Scientometric Approach

    Article • The World Journal of Men s Health, January 2022, Korean Society for Sexual Medicine and Andrology (KAMJE)

    Ramadan Saleh, Professor Ralf Reinhold Henkel

  15. Sperm Morphology Assessment in the Era of Intracytoplasmic Sperm Injection: Reliable Results Require Focus on Standardization, Quality Control, and Training

    Article • The World Journal of Men s Health, January 2022, Korean Society for Sexual Medicine and Andrology (KAMJE)

    Ramadan Saleh, Professor Ralf Reinhold Henkel

  16. Relevance of Leukocytospermia and Semen Culture and Its True Place in Diagnosing and Treating Male Infertility

    Article • The World Journal of Men s Health, January 2022, Korean Society for Sexual Medicine and Andrology (KAMJE)

    Ramadan Saleh, Professor Ralf Reinhold Henkel

  17. Male Age and Progressive Sperm Motility Are Critical Factors Affecting Embryological and Clinical Outcomes in Oocyte Donor ICSI Cycles

    Article • Reproductive Sciences, November 2021, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  18. A systemic review and meta‐analysis exploring the predictors of sperm retrieval in patients with non‐obstructive azoospermia and chromosomal abnormalities

    Article • Andrologia, November 2021, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  19. Polymorphisms of androgens‐related genes and idiopathic male infertility in Turkish men

    Article • Andrologia, October 2021, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  20. Association among sperm chromatin condensation, sperm DNA fragmentation and 8‐OHdG in seminal plasma and semen parameters in infertile men with oligoasthenoteratozoospermia

    Article • Andrologia, October 2021, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  21. Somatic-Immune Cells Crosstalk In-The-Making of Testicular Immune Privilege

    Article • Reproductive Sciences, September 2021, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  22. The effect of sperm DNA fragmentation on intracytoplasmic sperm injection outcome

    Article • Andrologia, July 2021, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  23. Long-term consequences of sexually transmitted infections on men’s sexual function: A systematic review

    Article • Arab Journal of Urology, July 2021, Taylor & Francis

    Professor Ralf Reinhold Henkel

  24. Endocrine contribution to the sexual dysfunction in patients with advanced chronic kidney disease and the role of hyperprolactinemia

    Article • Andrologia, June 2021, Wiley

    Professor Ralf Reinhold Henkel

  25. In vitro effects of aqueous extract of fermented rooibos (Aspalathus linearis) on human sperm function

    Article • Andrologia, May 2021, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  26. Reply to Letter to the Editor by Derakhshan et al. (2021) ‘Vagal nerve stimulation for the treatment of male factor infertility’

    Article • Andrologia, April 2021, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  27. Effect of microsurgical varicocelectomy on fertility outcome and treatment plans of patients with severe oligozoospermia: An original report and meta‐analysis

    Article • Andrologia, March 2021, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  28. Comparative study of fertility parameters in vitrified human spermatozoa in the presence or absence of EmbryORP ® : A novel antioxidant

    Article • Andrologia, February 2021, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  29. Editorial Commentary on Draft of World Health Organization Sixth Edition Laboratory Manual for the Examination and Processing of Human Semen

    Article • The World Journal of Men s Health, January 2021, Korean Society for Sexual Medicine and Andrology (KAMJE)

    Ramadan Saleh, Professor Ralf Reinhold Henkel

  30. A Global Survey of Reproductive Specialists to Determine the Clinical Utility of Oxidative Stress Testing and Antioxidant Use in Male Infertility

    Article • The World Journal of Men s Health, January 2021, Korean Society for Sexual Medicine and Andrology (KAMJE)

    Ramadan Saleh, Professor Ralf Reinhold Henkel

  31. A Novel Approach to Improving the Reliability of Manual Semen Analysis: A Paradigm Shift in the Workup of Infertile Men

    Article • The World Journal of Men s Health, January 2021, Korean Society for Sexual Medicine and Andrology (KAMJE)

    Professor Ralf Reinhold Henkel

  32. An In-Depth Bibliometric Analysis and Current Perspective on Male infertility Research

    Article • The World Journal of Men s Health, January 2021, Korean Society for Sexual Medicine and Andrology (KAMJE)

    Professor Ralf Reinhold Henkel

  33. Utility of Antioxidants in the Treatment of Male Infertility: Clinical Guidelines Based on a Systematic Review and Analysis of Evidence

    Article • The World Journal of Men s Health, January 2021, XMLink

    Professor Ralf Reinhold Henkel

  34. Male infertility

    Article • The Lancet, January 2021, Elsevier

    Professor Ralf Reinhold Henkel

  35. Association of XRCC1 and ERCC2 promoters’ methylation with chromatin condensation and sperm DNA fragmentation in idiopathic oligoasthenoteratozoospermic men

    Article • Andrologia, December 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  36. A scientometric analysis of research publications on male infertility and assisted reproductive technology

    Article • Andrologia, November 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  37. Aqueous leaf extract ofMoringa oleiferareduced intracellular ROS production, DNA fragmentation and acrosome reaction in Human spermatozoa in vitro

    Article • Andrologia, November 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  38. Semiquantitative promoter methylation ofMLH1andMSH2genes and their impact on sperm DNA fragmentation and chromatin condensation in infertile men

    Article • Andrologia, October 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  39. Quest for the best—A move to Anatomical Endoscopic Enucleation of the Prostate

    Article • Andrologia, September 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  40. Epididymal contribution to male infertility: An overlooked problem

    Article • Andrologia, August 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  41. An update on the techniques used to measure oxidative stress in seminal plasma

    Article • Andrologia, August 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  42. PICSI vs. MACS for abnormal sperm DNA fragmentation ICSI cases: a prospective randomized trial

    Article • Journal of Assisted Reproduction and Genetics, August 2020, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  43. Scientific landscape of oxidative stress in male reproductive research: A scientometric study

    Article • Free Radical Biology and Medicine, August 2020, Elsevier

    Professor Ralf Reinhold Henkel

  44. TUNEL assay—Standardized method for testing sperm DNA fragmentation

    Article • Andrologia, July 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  45. The role of infections and leukocytes in male infertility

    Article • Andrologia, July 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  46. Comparative analysis of tests used to assess sperm chromatin integrity and DNA fragmentation

    Article • Andrologia, July 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  47. Proteomics and metabolomics — Current and future perspectives in clinical andrology

    Article • Andrologia, June 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  48. Etiologies of sperm DNA damage and its impact on male infertility

    Article • Andrologia, June 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  49. Causes and consequences of sperm mitochondrial dysfunction

    Article • Andrologia, June 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  50. Diagnostic value of advanced semen analysis in evaluation of male infertility

    Article • Andrologia, May 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  51. Protein profiling in unlocking the basis of varicocele‐associated infertility

    Article • Andrologia, May 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  52. Environmental contaminants and male infertility: Effects and mechanisms

    Article • Andrologia, May 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  53. Diagnostic value of routine semen analysis in clinical andrology

    Article • Andrologia, May 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  54. Evaluation of seminal oxidation–reduction potential in male infertility

    Article • Andrologia, May 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  55. Total antioxidant capacity—Relevance, methods and clinical implications

    Article • Andrologia, May 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  56. Obesity and male infertility: Mechanisms and management

    Article • Andrologia, May 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  57. Seminal oxidation–reduction potential levels are not influenced by the presence of leucocytospermia

    Article • Andrologia, May 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  58. The effect of oxidative and reductive stress on semen parameters and functions of physiologically normal human spermatozoa

    Article • Free Radical Biology and Medicine, May 2020, Elsevier

    Professor Ralf Reinhold Henkel

  59. High levels of oxidation–reduction potential in frozen‐thawed human semen are significantly correlated with poor post‐thaw sperm quality

    Article • Andrologia, April 2020, Wiley

    Ramadan Saleh, Professor Ralf Reinhold Henkel

  60. Novel additive for sperm cryopreservation media: Holotheria parva coelomic cavity extract protects human spermatozoa against oxidative stress—A pilot study

    Article • Andrologia, April 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  61. Reactive oxygen species in male reproduction: A boon or a bane?

    Article • Andrologia, April 2020, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  62. Efficacy of Antioxidant Supplementation on Conventional and Advanced Sperm Function Tests in Patients with Idiopathic Male Infertility

    Article • Antioxidants, March 2020, MDPI AG

    Professor Ralf Reinhold Henkel

  63. Geographical differences in semen characteristics: Comparing semen parameters of infertile men of the United States and Iraq

    Article • Andrologia, January 2020, Wiley

    Dr Pallav Sengupta, Ayad palani, Professor Ralf Reinhold Henkel

  64. Predictive value of oxidative stress testing in semen for sperm DNA fragmentation assessed by sperm chromatin dispersion test

    Article • Andrology, January 2020, Wiley

    Professor Ralf Reinhold Henkel

  65. Male Fertility and the COVID-19 Pandemic: Systematic Review of the Literature

    Article • The World Journal of Men s Health, January 2020, Korean Society for Sexual Medicine and Andrology (KAMJE)

    Professor Ralf Reinhold Henkel

  66. Sperm DNA Fragmentation: A New Guideline for Clinicians

    Article • The World Journal of Men s Health, January 2020, XMLink

    Professor Ralf Reinhold Henkel

  67. A Schematic Overview of the Current Status of Male Infertility Practice

    Article • The World Journal of Men s Health, January 2020, Korean Society for Sexual Medicine and Andrology (KAMJE)

    Professor Ralf Reinhold Henkel

  68. Ritalinic Acid Stimulates Human Sperm Motility and Maintains VitalityIn Vitro

    Article • The World Journal of Men s Health, January 2020, XMLink

    Professor Ralf Reinhold Henkel

  69. Effects of temperature and storage time on the motility, viability, DNA integrity and apoptosis of processed human spermatozoa

    Article • Andrologia, December 2019, Wiley

    Professor Ralf Reinhold Henkel

  70. Tracking research trends and hotspots in sperm DNA fragmentation testing for the evaluation of male infertility: a scientometric analysis

    Article • Reproductive Biology and Endocrinology, December 2019, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  71. Globozoospermia syndrome: An update

    Article • Andrologia, November 2019, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  72. Automation of human semen analysis using a novel artificial intelligence optical microscopic technology

    Article • Andrologia, October 2019, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  73. Is there plagiarism in the most influential publications in the field of andrology?

    Article • Andrologia, September 2019, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  74. Carica papaya seed extract slows human sperm

    Article • Journal of Ethnopharmacology, September 2019, Elsevier

    Professor Ralf Reinhold Henkel

  75. Obesity and metabolic syndrome associated with systemic inflammation and the impact on the male reproductive system

    Article • American Journal of Reproductive Immunology, August 2019, Wiley

    Professor Ralf Reinhold Henkel

  76. TUNEL assay: Establishing a sperm DNA fragmentation cut‐off value for Egyptian infertile men

    Article • Andrologia, July 2019, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  77. SNP’s in xenobiotic metabolism and male infertility

    Article • Xenobiotica, May 2019, Taylor & Francis

    Sezgin GUNES, Professor Ralf Reinhold Henkel

  78. Correlation of oxidation–reduction potential with hormones, semen parameters and testicular volume

    Article • Andrologia, February 2019, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  79. Male Oxidative Stress Infertility (MOSI): Proposed Terminology and Clinical Practice Guidelines for Management of Idiopathic Male Infertility

    Article • The World Journal of Men s Health, January 2019, Korean Society for Sexual Medicine and Andrology (KAMJE)

    Dr Sandro C Esteves, Ramadan Saleh, Professor Ralf Reinhold Henkel

  80. Critical evaluation of two models of flow cytometers for the assessment of sperm DNA fragmentation: an appeal for performance verification

    Article • Asian Journal of Andrology, January 2019, Medknow

    Professor Ralf Reinhold Henkel

  81. Oleanolic acid causes reversible contraception in male mice by increasing the permeability of the germinal epithelium

    Article • Reproduction Fertility and Development, January 2019, CSIRO Publishing

    Professor Ralf Reinhold Henkel

  82. Protective effects of saffron against zearalenone-induced alterations in reproductive hormones in female mice (Mus musculus)

    Article • Clinical and Experimental Reproductive Medicine, December 2018, The Korean Society for Reproductive Medicine (KAMJE)

    Ramadan Saleh, Professor Ralf Reinhold Henkel

  83. Home sperm testing device versus laboratory sperm quality analyzer: comparison of motile sperm concentration

    Article • Fertility and Sterility, December 2018, Elsevier

    Professor Ralf Reinhold Henkel

  84. Role of oxidative stress, infection and inflammation in male infertility

    Article • Andrologia, December 2018, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  85. Radiations and male fertility

    Article • Reproductive Biology and Endocrinology, December 2018, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  86. The excessive use of antioxidant therapy: A possible cause of male infertility?

    Article • Andrologia, September 2018, Wiley

    Professor Ralf Reinhold Henkel

  87. Reactive oxygen species and male reproductive hormones

    Article • Reproductive Biology and Endocrinology, September 2018, Springer Science + Business Media

    Mohammad Reza Sadeghi, Dr Pallav Sengupta, Professor Ralf Reinhold Henkel

  88. Sperm cryopreservation: A review on current molecular cryobiology and advanced approaches

    Article • Reproductive BioMedicine Online, September 2018, Elsevier

    Professor Ralf Reinhold Henkel

  89. Smoking-induced genetic and epigenetic alterations in infertile men

    Article • Andrologia, August 2018, Wiley

    Professor Ralf Reinhold Henkel, Sezgin GUNES

  90. Promoter methylation analysis of CDH1 and p14ARF genes in patients with urothelial bladder cancer

    Article • OncoTargets and Therapy, July 2018, Dove Medical Press

    Professor Ralf Reinhold Henkel, Bayram Bayramov, Sezgin GUNES

  91. Reactive oxygen species impact on sperm DNA and its role in male infertility

    Article • Andrologia, April 2018, Wiley

    Professor Ralf Reinhold Henkel

  92. The in vitro modulation of steroidogenesis by inflammatory cytokines and insulin in TM3 Leydig cells

    Article • Reproductive Biology and Endocrinology, March 2018, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  93. Laboratory assessment of oxidative stress in semen

    Article • Arab Journal of Urology, March 2018, Taylor & Francis

    Professor Ralf Reinhold Henkel

  94. Evaluation of reference values of standard semen parameters in fertile Egyptian men

    Article • Andrologia, January 2018, Wiley

    Professor Ralf Reinhold Henkel, Ramadan Saleh

  95. Human sperm handling in intracytoplasmic sperm injection processes: In vitro studies on mouse oocyte activation, embryo development competence and sperm oxidation-reduction potential

    Article • Andrologia, January 2018, Wiley

    Professor Ralf Reinhold Henkel, Dr Sandro C Esteves

  96. Calibration of redox potential in sperm wash media and evaluation of oxidation-reduction potential values in various assisted reproductive technology culture media using MiOXSYS system

    Article • Andrology, January 2018, Wiley

    Professor Ralf Reinhold Henkel

  97. Microtubular Dysfunction and Male Infertility

    Article • The World Journal of Men s Health, January 2018, Korean Society for Sexual Medicine and Andrology (KAMJE)

    Dr Pallav Sengupta, Professor Ralf Reinhold Henkel

  98. Role of Withania somnifera (Ashwagandha) in the management of male infertility

    Article • Reproductive BioMedicine Online, December 2017, Elsevier

    Dr Pallav Sengupta, Professor Ralf Reinhold Henkel

  99. Redox Regulation of Fertility in Aging Male and the Role of Antioxidants: A Savior or Stressor

    Article • Current Pharmaceutical Design, November 2017, Bentham Science Publishers

    Professor Ralf Reinhold Henkel

  100. Determination of seminal oxidation-reduction potential (ORP) as an easy and cost-effective clinical marker of male infertility

    Article • Andrologia, October 2017, Wiley

    Professor Ralf Reinhold Henkel

  101. Association between promoter methylation of MLH1 and MSH2 and reactive oxygen species in oligozoospermic men-A pilot study

    Article • Andrologia, October 2017, Wiley

    Professor Ralf Reinhold Henkel, Dr Sandro C Esteves

  102. Clinical utility of sperm DNA fragmentation testing: a commentary

    Article • Translational Andrology and Urology, September 2017, AME Publishing Company

    Professor Ralf Reinhold Henkel

  103. Interpretation of semen analysis using WHO 1999 and WHO 2010 reference values: Abnormal becoming normal

    Article • Andrologia, August 2017, Wiley

    Professor Ralf Reinhold Henkel

  104. Effect of Typha capensis (Rohrb.)N.E.Br. rhizome extract F1 fraction on cell viability, apoptosis induction and testosterone production in TM3-Leydig cells

    Article • Andrologia, July 2017, Wiley

    Professor Ralf Reinhold Henkel

  105. Oral health and pregnancy

    Article • Biomarkers, June 2017, Taylor & Francis

    Emerita Professor Charlene WJ Africa, Professor Ralf Reinhold Henkel

  106. Cumene hydroperoxide induced changes in oxidation-reduction potential in fresh and frozen seminal ejaculates

    Article • Andrologia, March 2017, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  107. Semen culture and the assessment of genitourinary tract infections

    Article • Indian Journal of Urology, January 2017, Medknow

    Professor Ralf Reinhold Henkel

  108. Metabolic syndrome is associated with increased seminal inflammatory cytokines and reproductive dysfunction in a case‐controlled male cohort

    Article • American Journal of Reproductive Immunology, June 2016, Wiley

    Professor Ralf Reinhold Henkel

  109. Bibliometrics: tracking research impact by selecting the appropriate metrics

    Article • Asian Journal of Andrology, January 2016, Medknow

    Dr Sandro C Esteves, Professor Ralf Reinhold Henkel

  110. An Update on Oxidative Damage to Spermatozoa and Oocytes

    Article • BioMed Research International, January 2016, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  111. Eduardo Bustos-Obregón (1937-2014)

    Article • Andrologia, January 2015, Wiley

    Professor Ralf Reinhold Henkel

  112. Novel Sperm Tests and Their Importance

    Article • July 2014, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  113. Effect ofCissampelos capensisrhizome extract on human spermatozoain vitro

    Article • Andrologia, March 2014, Wiley

    Professor Ralf Reinhold Henkel, salem shalaweh

  114. Phytoandrogenic properties ofEurycoma longifoliaas natural alternative to testosterone replacement therapy

    Article • Andrologia, January 2014, Wiley

    Professor Ralf Reinhold Henkel

  115. The impact of male overweight on semen quality and outcome of assisted reproduction

    Article • Asian Journal of Andrology, January 2014, Medknow

    Professor Ralf Reinhold Henkel

  116. Chapter-16 Infections in Male Infertility

    Article • January 2014, Jaypee Brothers Medical Publishing

    Professor Ralf Reinhold Henkel

  117. Obesity is associated with increased seminal insulin and leptin alongside reduced fertility parameters in a controlled male cohort

    Article • Reproductive Biology and Endocrinology, January 2014, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  118. The impact of sperm DNA damage in assisted conception and beyond: recent advances in diagnosis and treatment

    Article • Reproductive BioMedicine Online, October 2013, Elsevier

    Professor Ralf Reinhold Henkel

  119. The relationship between seminal leukocytes, oxidative status in the ejaculate, and apoptotic markers in human spermatozoa

    Article • Systems Biology in Reproductive Medicine, July 2013, Taylor & Francis

    Professor Ralf Reinhold Henkel

  120. Tongkat Ali as a Potential Herbal Supplement for Physically Active Male and Female Seniors-A Pilot Study

    Article • Phytotherapy Research, June 2013, Wiley

    Professor Ralf Reinhold Henkel

  121. In vivoeffects ofEurycoma longifoliaJack (Tongkat Ali) extract on reproductive functions in the rat

    Article • Andrologia, March 2013, Wiley

    Professor Ralf Reinhold Henkel

  122. Infection in Infertility

    Article • January 2013, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  123. Sperm Processing for IVF

    Article • January 2013, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  124. Effect of the metabolic syndrome on male reproductive function: a case-controlled pilot study

    Article • Andrologia, December 2012, Wiley

    Professor Ralf Reinhold Henkel

  125. Effect of Eurycoma longifolia Jack (Tongkat ali) extract on human spermatozoa in vitro

    Article • Andrologia, February 2012, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  126. Infection in Infertility

    Article • January 2012, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  127. Sperm Processing for IVF

    Article • January 2012, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  128. ROS and Semen Quality

    Article • January 2012, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  129. Sperm preparation: state-of-the-art—physiological aspects and application of advanced sperm preparation methods

    Article • Asian Journal of Andrology, December 2011, Medknow

    Professor Ralf Reinhold Henkel

  130. Accurate sperm morphology assessment predicts sperm function

    Article • Andrologia, November 2011, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  131. Sequential analysis of sperm functional aspects involved in fertilisation: a pilot study

    Article • Andrologia, July 2011, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  132. Typha capensis (Rohrb.)N.E.Br. (bulrush) extract scavenges free radicals, inhibits collagenase activity and affects human sperm motility and mitochondrial membrane potential in vitro: a pilot study

    Article • Andrologia, July 2011, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  133. Standardised water-soluble extract of Eurycoma longifolia, Tongkat ali, as testosterone booster for managing men with late-onset hypogonadism?

    Article • Andrologia, June 2011, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  134. Sperm cell biology: current perspectives and future prospects

    Article • Asian Journal of Andrology, November 2010, Medknow

    Professor Ralf Reinhold Henkel

  135. Leukocytes and oxidative stress: dilemma for sperm function and male fertility

    Article • Asian Journal of Andrology, November 2010, Medknow

    Professor Ralf Reinhold Henkel

  136. TUNEL assay and SCSA determine different aspects of sperm DNA damage

    Article • Andrologia, September 2010, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  137. ROS and DNA integrity—implications of male accessory gland infections

    Article • June 2010, Taylor & Francis

    Professor Ralf Reinhold Henkel

  138. Leucocytes and intrinsic ROS production may be factors compromising sperm chromatin condensation status

    Article • Andrologia, April 2010, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  139. A novel approach for the selection of human sperm using annexin V-binding and flow cytometry

    Article • Fertility and Sterility, April 2009, Elsevier

    Professor Ralf Reinhold Henkel

  140. Comparison of three staining methods for the morphological evaluation of human spermatozoa

    Article • Fertility and Sterility, February 2008, Elsevier

    Professor Ralf Reinhold Henkel

  141. Age-related changes in seminal polymorphonuclear elastase in men with asymptomatic inflammation of the genital tract

    Article • Asian Journal of Andrology, May 2007, Medknow

    Professor Ralf Reinhold Henkel

  142. Detection of DNA damage in sperm

    Article • January 2007, Taylor & Francis

    Professor Ralf Reinhold Henkel

  143. The pathophysiology and genetics of human male reproduction

    Article • January 2007, Taylor & Francis

    Professor Ralf Reinhold Henkel

  144. DNA fragmentation and its influence on fertilization and pregnancy outcome

    Article • January 2007, Taylor & Francis

    Professor Ralf Reinhold Henkel

  145. Evaluation of Uridine Metabolism in Human and Animal Spermatozoa

    Article • Nucleosides Nucleotides & Nucleic Acids, June 2006, Taylor & Francis

    Professor Ralf Reinhold Henkel

  146. Chronic pelvic pain syndrome/chronic prostatitis affect the acrosome reaction in human spermatozoa

    Article • World Journal of Urology, January 2006, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  147. Seasonal Changes of Neutral α‐Glucosidase Activity in Human Semen

    Article • Journal of Andrology, January 2006, Wiley

    Professor Ralf Reinhold Henkel

  148. The impact of oxidants on sperm function

    Article • Andrologia, December 2005, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  149. Molecular aspects of declining sperm motility in older men

    Article • Fertility and Sterility, November 2005, Elsevier

    Professor Ralf Reinhold Henkel

  150. Effect of reactive oxygen species produced by spermatozoa and leukocytes on sperm functions in non-leukocytospermic patients

    Article • Fertility and Sterility, March 2005, Elsevier

    Professor Ralf Reinhold Henkel

  151. Sperm function and assisted reproduction technology

    Article • Reproductive Medicine and Biology, March 2005, Wiley

    Professor Ralf Reinhold Henkel

  152. Sperm function and assisted reproduction technology

    Article • Reproductive Medicine and Biology, March 2005, Wiley

    Professor Ralf Reinhold Henkel

  153. Influence of macrophage migration inhibitory factor (MIF) on the zinc content and redox state of protein-bound sulphydryl groups in rat sperm: indications for a new role of MIF in sperm maturation

    Article • Molecular Human Reproduction, June 2004, Oxford University Press (OUP)

    Professor Ralf Reinhold Henkel

  154. Influence of deoxyribonucleic acid damage on fertilization and pregnancy

    Article • Fertility and Sterility, April 2004, Elsevier

    Professor Ralf Reinhold Henkel

  155. Update on the impact of Chlamydia trachomatis infection on male fertility

    Article • Andrologia, February 2004, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  156. Urogenital inflammation: changes of leucocytes and ROS

    Article • Andrologia, October 2003, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  157. Urogenital inflammation: changes of leucocytes and ROS

    Article • Andrologia, October 2003, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  158. Reactive oxygen species induce reversible capacitation in human spermatozoa

    Article • Andrologia, August 2003, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  159. Metal chelators change the human sperm motility pattern

    Article • Fertility and Sterility, June 2003, Elsevier

    Professor Ralf Reinhold Henkel

  160. Limitations for ICSI, MESA, TESE? - experiences from the IVF centre in Giessen

    Article • Andrologia, May 2003, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  161. Assisted reproductive techniques: risks, contraindications, prognostic factors, therapeutic strategies

    Article • Andrologia, May 2003, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  162. Resorption of the Element Zinc from Spermatozoa by the Epididymal Epithelium

    Article • Reproduction in Domestic Animals, March 2003, Wiley

    Professor Ralf Reinhold Henkel

  163. Preface

    Article • Andrologia, January 2003, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  164. DNA fragmentation of spermatozoa and assisted reproduction technology

    Article • Reproductive BioMedicine Online, January 2003, Elsevier

    Professor Ralf Reinhold Henkel

  165. Article • Journal of Assisted Reproduction and Genetics, January 2003, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  166. Article • Reproductive Biology and Endocrinology, January 2003, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  167. Indirect immunofluorescence using monoclonal antibodies for the detection of leukocytospermia: comparison with peroxidase staining

    Article • Andrologia, April 2002, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  168. Development of a new, highly sensitive zona pellucida binding assay using a bioluminescence-enhanced detection system

    Article • Andrologia, July 2001, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  169. Article • Journal of Assisted Reproduction and Genetics, January 2001, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  170. Determinación de la variabilidad en la condensación de la cromatina espermática y alfa-glucosidasa seminal con relación al espermiograma

    Article • Revista médica de Chile, May 2000, SciELO Comision Nacional de Investigacion Cientifica Y Tecnologica (CONICYT)

    Professor Ralf Reinhold Henkel

  171. Relevance of zinc in human sperm flagella and its relation to motility

    Article • Fertility and Sterility, June 1999, Elsevier

    Professor Ralf Reinhold Henkel

  172. Different cumulative pregnancy rates in patients with repeated IVF- or ICSI cycles: possible influence of a male factor

    Article • Andrologia, May 1999, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  173. Different cumulative pregnancy rates in patients with repeated IVF- or ICSI cycles: possible influence of a male factor

    Article • Andrologia, May 1999, Hindawi Publishing Corporation

    Professor Ralf Reinhold Henkel

  174. Article • Journal of Assisted Reproduction and Genetics, January 1999, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  175. Production and characterization of monoclonal antibodies to the major protein of boar outer dense fibers

    Article • Journal of Reproductive Immunology, October 1998, Elsevier

    Professor Ralf Reinhold Henkel

  176. Immunoelectron Microscopic Studies on Outer Dense Fibres

    Article • January 1997, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  177. Glass wool filtration reduces reactive oxygen species by elimination of leukocytes in oligozoospermic patients with leukocytospermia

    Article • Journal of Assisted Reproduction and Genetics, July 1996, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  178. The monoclonal antibody GZS-1 detects a maturation-associated antigen of human spermatozoa that is also present on the surface of human mononuclear blood cells

    Article • Journal of Reproductive Immunology, May 1996, Elsevier

    Professor Ralf Reinhold Henkel

  179. Defining bioassay conditions to evaluate sperm/zona interaction: Inhibition of zona binding mediated by solubilized human zona pellucida

    Article • Journal of Assisted Reproduction and Genetics, April 1996, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  180. Integrins and adhesion molecules: Low expression of adhesion molecules and matrix proteins in patients showing poor penetration in zona-free hamster oocytes

    Article • Molecular Human Reproduction, January 1996, Oxford University Press (OUP)

    Professor Ralf Reinhold Henkel

  181. Comparison Between Swim-Up and Glass Wool Column Filtration of Human Semen in a Gamete Intrafallopian Transfer Program

    Article • Archives of Andrology, January 1996, Taylor & Francis

    Professor Ralf Reinhold Henkel

  182. Influence of elevated pH levels on structural and functional characteristics of the human zona pellucida: Functional morphological aspects

    Article • Journal of Assisted Reproduction and Genetics, October 1995, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  183. Further indications of the multicomponent nature of the acrosome reaction-inducing substance of human follicular fluid

    Article • Molecular Reproduction and Development, September 1995, Wiley

    Professor Ralf Reinhold Henkel

  184. Acrosin Activity of Human Spermatozoa by Means of a Simple Gelatinolytic Technique: A Method Useful for IVF

    Article • Journal of Andrology, May 1995, Wiley

    Professor Ralf Reinhold Henkel

  185. Selective capacity of glass-wool filtration for the separation of human spermatozoa with condensed chromatin: A possible therapeutic modality for male-factor cases?

    Article • Journal of Assisted Reproduction and Genetics, September 1994, Springer Science + Business Media

    Professor Ralf Reinhold Henkel

  186. Outer dense fibres of human spermatozoa: partial characterization and possible physiological functions

    Article • International Journal of Andrology, April 1994, Wiley

    Professor Ralf Reinhold Henkel

  187. Biochemical and Immunological Characterization of the Acrosome Reaction-Inducing Substance (ARIS) of HFF

    Article • Biochemical and Biophysical Research Communications, February 1994, Elsevier

    Professor Ralf Reinhold Henkel

  188. Fertilization and early embryology: Determination of the acrosome reaction in human spermatozoa is predictive of fertilization in vitro

    Article • Human Reproduction, December 1993, Oxford University Press (OUP)

    Professor Ralf Reinhold Henkel

  189. Isolation and Partial Characterization of the Outer Dense Fiber Proteins from Human Spermatozoa

    Article • Biological Chemistry Hoppe-Seyler, January 1992, De Gruyter

    Professor Ralf Reinhold Henkel

  190. Poor development of outer dense fibres as a major cause of tail abnormalities in the spermatozoa of asthenoteratozoospermic men*

    Article • Human Reproduction, November 1991, Oxford University Press (OUP)

    Professor Ralf Reinhold Henkel

  191. Ultrastructure, protein synthesis and secretion of day-6 rabbit blastocysts cultured in a chemically defined, protein-free medium

    Article • Referate und Beiträge zur Anatomie und Entwickelungsgeschichte, November 1990, Springer Science + Business Media

    Professor Ralf Reinhold Henkel