Cohort study demonstrates conception occurs within a six-day fertile window ending on ovulation in healthy women, indicating timing does not influence baby sex.
Among healthy women trying to conceive, nearly all pregnancies can be attributed to intercourse during a six-day period ending on the day of ovulation. For practical purposes, the timing of sexual intercourse in relation to ovulation has no influence on the sex of the baby.
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Wilcox et al. (1995) studied this question.
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