In mammals - including us humans - sperm are surprisingly picky about temperature, thriving best in conditions a few degrees ...

All mammals have a particular protein on the surface of sperm called CatSper. It controls the entry of the particles needed ...

Sperm swim faster in high temperature environments; aging ovaries slowly lose egg support. Both affect fertility differently.

WashU Medicine researcher Polina Lishko, a BJC Investigator and professor of cell biology and physiology, has shown in mice ...

Activation of sperm surface protein . Research on mice revealed that a particular protein, found in all mammals called ...

The vaquita is a rare species of porpoise endemic to the northern end of the Gulf of California in Baja, California. Vaquitas ...

Lekking occurs when males of certain animal species gather to attract females in specific locations, known as leks.

Gorillas social bonds can help or hurt. Females in small groups stay healthier with strong ties. In groups, they get sick but ...

Animals that rely exclusively on parthenogenesis to reproduce, like the flowerpot snake, are called obligate parthenogens, ...