How women can deal with periods in space

Who was the first woman to have her period in space? What is it like changing sanitary products while being weightless? And why doesn't menstrual flow just float up into the body when gravity isn't around?

Molecule regulating sperm motility discovered

About 120 million unintended pregnancies occurred each year between 2015 and 2019 worldwide. While there are oral contraceptives for women, the development of oral contraceptives for men has not been successful. Now, a team ...