A new study identifies the defective function of CatSper, an ion channel controlling calcium levels in sperm, as a common cause of seemingly unexplained male infertility. CatSper-deficient human sperm ...

Plant reproduction is the production of new individuals from one or more parent plants. This can be accomplished by sexual or asexual means. The florigen activation complex drives the pivotal ...

The Minnesota Democrat on the battle between his city and the federal government. By Lulu Garcia-Navarro As I grew older, things about my family’s history began to seem … off. By Kwame Anthony Appiah ...

Jan. 3, 2026 A one-dose oral drug called zoliflodacin has proven highly effective against gonorrhoea in a major international trial. The pill matched the success of current treatments while avoiding ...

Implantation occurs about 10 days after ovulation and marks the beginning of pregnancy. Signs you are in the implantation phase may include light bleeding, fatigue, and mild cramping. Tracking your ...

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 ...