Monday, January 30, 2006

Hard times lead to fewer male babies

TUESDAY, Jan. 24 (HealthDay News) — Males may be the stronger sex, but females rule the roost when it comes to numbers and new research is providing some possible insight into why.

Nearly two centuries of Swedish genealogy records suggest that pregnant women are more likely to spontaneously abort male fetuses and embryos during times of stress. The resulting generations of children are stronger and actually live longer than those born during good times, the researchers contend.

Scientists have known for decades that male fetuses have a more difficult time surviving pregnancy than females. And pregnant women tend to produce more female children during times of stress, such as a famine.
Interesting tidbit.

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