A Guide to Reproductive Diversity,” the second work by the author of “The Ecology of Center City, Philadelphia.” Frank, a ...

have created a new type of insect cyborg that can navigate autonomously -- without wires, surgery, or stress-inducing electrical shocks. The system uses a small ultraviolet (UV) light helmet to steer ...

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 ...

Termites did not evolve complex societies by adding new genetic features. Instead, scientists found that they became more ...

From the moment of conception, all cells and eventually all individuals, must pass critical thresholds. Researchers in the Department of Obstetrics and Gynecology, Maternal, Child and Adolescent ...

You can get pregnant from your first menstrual period until menopause, but fertility declines with age and drops faster after about ages 35 to 37 years. Experts say the best time to get pregnant is ...