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Early Menarche Leads to Baby Girls

by Sheela Philomena on May 3, 2011 at 12:22 PM
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 Early Menarche Leads to Baby Girls

Women who start menstruating at an early age than their peers are more likely to give birth to girls, suggests recent study.

Misao Fukuda at the M and K Health Institute in Hyogo, Japan, and colleagues, asked over 10,000 mothers the age at which they had begun their period and the sex of their baby, reports New Scientist.

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Forty-six percent of the children born to women who began their periods at age 10 were boys. This figure rose to 50 percent when the woman began her period at 12, and 53 percent when the women entered menarche at age 14.

The study adds evidence to a previous research, which demonstrated higher levels of the female sex hormone oestradiol in women who entered menarche before the age of 12.

Fukuda said this might lead to spontaneous miscarriage of fertilised male eggs.

The study is published in Human Reproduction

Source: ANI
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