New Scientist
We commonly think that sperm determines the sex of a child, depending on whether it carries an X or Y chromosome, but a study now suggests that a woman’s age is also a factor…
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Your chance of having a boy or girl may not be 50/50
Elroy Stoval
00:20
We commonly think that sperm determines the sex of a child, depending on whether it carries an X or Y chromosome, but a study now suggests that a woman’s age is also a factor…
