The biological factory that produces reproductive cells has a robust quality control system to identify and eliminate eggs with chromosomal abnormalities. For years, cell biologists have sought to ...

A team of scientists at the University of Seville has identified an essential process that protects DNA integrity in reproductive cells, providing new clues about how organisms avoid genetic defects ...

The earliest days after fertilization, once a sperm cell meets an egg, are shrouded in scientific mystery. The process of how a humble single cell becomes an organism fascinates scientists across ...

Early lab work shows reprogrammed skin cells can yield embryos, hinting at future infertility solutions but raising safety questions that demand more study. Infertility affects millions of people ...

Medically reviewed by Andrea L. Braden, MD Key Takeaways The female reproductive system includes organs that produce hormones like estrogen and progesterone. Ovaries release one mature egg each month ...

It’s not just about chromosomes. Or reproductive cells. Or any other binary metric. Many genetic, environmental and developmental variations can produce what are thought of as masculine and feminine ...

The method could one day become a treatment for infertility A decade of further research needed, scientists say The process overcomes an obstacle that stymied previous attempts Significant safety ...

Semen is a fluid that carries sperm, or male reproductive cells, out of the body during ejaculation. The average amount of ...

But they've done a lot more than that. The impact of sex as a biological variable is far more subtle and pervasive than it may seem. In fact, sex-based differences with implications for our health ...