3 papers analyzed
Some studies suggest that certain conditions may result in more female births, while other studies indicate that the sex ratio of newborns does not significantly change with maternal age or birth order.
The question of whether all babies are born female is a common misconception. Scientific research has extensively studied the sex ratio at birth, which is the proportion of male to female newborns. This synthesis aims to present key insights from multiple research papers to address this question.
Sex Ratio in General Populations:
Impact of Maternal Age and Parity:
Special Populations:
The research clearly indicates that not all babies are born female. The typical sex ratio at birth slightly favors males. While maternal age and parity generally do not affect this ratio, specific conditions such as grand grand multiparity and maternal health conditions like schizophrenia can influence the likelihood of giving birth to a female.
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