Learn how long-term mate switching helps a small beluga whale population maintain genetic diversity.

Juvenile social play predicts adult reproductive success in male bottlenose dolphins, a new study has found. Juvenile social play predicts adult reproductive success in male bottlenose dolphins, a new ...

Miscarriage affects up to 20% of recognised pregnancies and carries significant physical and emotional burdens for women and ...

Parents should bias sex allocation toward offspring of the sex most likely to provide higher fitness returns. Trivers and Willard proposed that for polygynous mammals, females should adjust sex-ratio ...

Animals have personalities too—and some animal couples raise their young better based on how well their personalities match. Greylag geese, which mate in long-term monogamous relationships, have ...

Male bonobos have an impressive ability to detect when females are most fertile, even though the usual visual cues are unreliable. Researchers tracking wild bonobos in the Congo discovered that males ...

New study from Case Western Reserve University reveals link between oxygen delivery and reproductive success among women living on the high Tibetan Plateau Breathing thin air at extreme altitudes ...