A duplicated gene evolved into a switch that determines sex in frogs, revealing how evolution can safely reshape critical ...

The female reproductive system includes organs that produce hormones like estrogen and progesterone. Ovaries release one mature egg each month during ovulation. Fallopian tubes transport the egg from ...

Early in development, many animals pick a team—male or female—based on their genetics, and, with time, acquire the ...

Scientists have uncovered a previously unknown cluster of brain cells that may help explain differences in social behavior ...

Researchers at the Icahn School of Medicine at Mount Sinai, in collaboration with other leading institutions across the ...

ESA’s Jupiter Icy Moons Explorer (JUICE) that was launched in 2023 will take about 8 years to arrive at the jovian system after several gravity assists. Credit: Space.com | animation courtesy: ESA / ...

Females are more immunoreactive than males and, although sex hormones have an important role in immune functions, the X chromosome is fundamental in shaping sex-specific immune responses. X-linked ...

In your 20s, higher estrogen keeps the vagina lubricated, elastic, and acidic. Mild discharge is typical, and washing the vulva with mild soap and water is usually enough to maintain vaginal health.

Immunodeficiency disorders weaken your immune system, making it harder to fight bacteria, viruses, and parasites and increasing your risk of frequent infections. There are two main types: primary ...