What is it about?
Using one million Chinese pregnancies from pre-pregnancy checkup exams, we provide the first documentation of strong and robust evidence of assortative mating by ABO blood type. Compared to random matching, individuals are 5-18% more likely to marry partners with the same blood type (see Table 1 in the paper). The pattern remains when we control for socioeconomic variables such as education, region, and behavior.
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Why is it important?
Assortative mating on blood type could have implications for organ transplants, for example.
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This page is a summary of: Assortative mating on blood type: Evidence from one million Chinese pregnancies, Proceedings of the National Academy of Sciences, December 2022, Proceedings of the National Academy of Sciences,
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