Pregnant mice block out unwelcome admirers to protect their pups
Mouse mothers-to-be have a remarkable way to protect their unborn pups. Because the smell of a strange male’s urine can cause miscarriage and reactivate the ovulatory cycle, pregnant mice prevent the action of such olfactory stimuli by blocking their smell. Researchers from the European Molecular Biology Laboratory in Monterotondo, Italy, have now revealed the nature of this ability.
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