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 ...

Researchers have recently identified and described a new genus and species of xanthid crab found in Okinawa Island, Ryukyu Islands, Japan. Named Mabui calculus, it is the first among the 7,800 species ...

The sex organs of primitive plants are inspiring precise pipettes. Liverworts are a group of ground-hugging plants with male and female reproductive structures shaped like tiny palm trees. The female ...