A large, long-term study across the US and Sweden finds potential correlations between specific pollutants and the proportions of male and female babies born.
The Scientist speaks with organismal biologist Xavier Glaudas about possible reasons for his recent finding that male Montpellier snakes cannibalize female conspecifics.
Engineered antibodies trap and immobilize human sperm in the reproductive tract of female sheep, paving the way for possible use as a nonhormonal contraceptive in people.
An analysis of journals from the American Geophysical Union finds women are underrepresented as reviewers, likely because editors recommend them less often.