Birth outcomes of monoamniotic twin pregnancies

What is it about?

Multiple pregnancies are at a higher risk of early death compared to singleton pregnancies. We report the results on the occurrence and frequency of death (during pregnancy and the first 28 days of life) for a very rare type of twin pregnancies (monoamniotic twins) using data from a collaboration between the Northern Survey of Twin and Multiple Pregnancy (NorSTAMP) and the Southwest Thames Region of London Obstetric Research Collaborative (STORK). Compared to previous decades, survival of MCMA twins from 24 weeks of gestation improved, presumably due to early diagnosis, close surveillance and elective birth around 32-34 weeks of pregnancy.

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Why is it important?

Monochorionic monoamniotic twin pregnancy is a very rare type of twin pregnancy occurring in 1 in 10,000 pregnancies and carrying a higher risk of adverse pregnancy outcomes compared to other pregnancies. It is important to report the current practice in antenatal surveillance and care and birth outcomes of these pregnancies from different parts of the world to add to the existing evidence.