Biological sex at birth isn’t random: Study on 146,000 pregnancies between 1956 and 2015 found that, rather than birth sex being a toss-up, some families were more likely to have children of the same sex. 👶👧👦📊
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#BiologicalSex #GenderStudies #FamilyPatterns #PregnancyResearch #SexRatio
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#BiologicalSex #GenderStudies #FamilyPatterns #PregnancyResearch #SexRatio
Harvard T.H. Chan School of Public Health
Biological sex at birth isn’t random, study finds | Harvard T.H. Chan School of Public Health
A child’s biological sex at birth may not be a 50-50 toss-up, according to a new study.
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