Some teensy fruit flies produce sperm more than 2 inches (5 centimeters) long.
The reproductive system is a collection of organs found in both sexes that work together for the purpose of producing offspring. Check here for the latest news related to the reproductive system, including fertility treatments and potential new technologies for having children.
An arthropod that lived 430 million years ago protected its developing young by attaching their egg pouches to its back with threads, trailing them like tiny kites.
The information carried in a man's sperm cells may depend on his body weight, a small new study finds.
A female water snake in Missouri can do something that no human woman can (no matter how badly she might want to).
Addyi, the new libido-enhancing pill for women, was approved by the FDA, but many health care professionals are still skeptical about whether women really need the drug.
A soft-bodied, fernlike creature reproduced in Earth's ancient oceans about 565 million years ago, making it the earliest known example of procreation in a complex organism, a new study finds.
An update to Apple's Health app that is set for release this fall will let users track their sex lives, but experts say this tracking feature alone has little value for people's health.
Baby boys who were exposed to a chemical in plastics may show some signs of altered genital development, according to new research published today.
New research shows how external genitals arose from very different starting places for reptiles and mammals.
Egg-freezing technology has improved in recent years, and the procedure will likely become more common in the future. But how much will it really change women's lives?
Chances are you've tried to hide a runny nose and cough when you're sick at the office or around family members, and a new study finds animals do something similar.
Parents of children with autism sometimes decide not to have more children after their first child is diagnosed or shows signs of the disorder, a new study suggests.
New research suggests that carrying around a cellphone in your pocket could lower sperm motility and viability.