Cohabiting couples differ on contraceptive use by class

Most cohabiting couples intend to delay childbirth until they're married, steadily employed and financially stable. Despite these preferences, surprise pregnancies are common, particularly among working-class men and women ...

9 hours ago
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Gut bacteria promote obesity in mice

A species of gut bacteria called Clostridium ramosum, coupled with a high-fat diet, may cause animals to gain weight. The work is published this week in mBio, the online open-access journal of the American Society for Microbiol ...

13 hours ago
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