US EditionIt’s a Girl — Again! And Again! Why a Baby’s Sex Isn’t Random
UNITED STATES, JUL 18 – Families with three children of the same sex have up to a 61% chance of having another child of that sex, influenced by maternal age and specific genetic variants.
- Friday's publication in Science Advances showed families with three boys have a 61% chance of having another boy, indicating a family-specific probability influenced by genetics and maternal age.
- Drawing on the Nurse’s Health Study of over 58,000 women from 1956 to 2015, Wang explained that women who have their first child after age 28 are about 10% more likely to have only boys or only girls.
- A genomic analysis revealed two common variants linked to single-sex sibling sets, namely NSUN6 associated with female-only offspring and TSHZ1 with male-only offspring.
- Families desiring children of both sexes should note skewed odds, the authors wrote, and Alex Polyakov said `Based on these findings, you have to tell couples that their chance of having a different-sex child from what they already have is actually less than 50:50`.
- Looking ahead, Jorge Chavarro says, the study is the “first draft of biological explanation,” and researchers noted more research is needed to clarify the factors behind these sex-ratio patterns.
31 Articles
31 Articles
Actually, boys and girls should be born with the same probability, but in some families only sons are born, in others only daughters. Researchers discover a clear pattern.
According to a study, the age of the mother can also determine the sex of the child.
Gender Isn't Quite a Coin Flip: Research
A newborn's sex isn't quite a coin flip, a new study suggests, finding that family genetics and maternal age mean it's more like tossing a weighted coin unique to each family. Researchers at Harvard University analyzed pregnancy data from more than 58,000 US nurses over six decades and found...
New Hampshire Union Leader
NZ HeraldIt’s a girl — again! And again! Why a baby’s sex isn’t random
A baby’s sex may not be up to mere chance.
kreiszeitung.de
"Should we try again to get another girl after two boys?" For some families, gender is a motivation for additional offspring. A study could sober them up.
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