When eggs are fertilized, they release a shower of zinc and manganese that may protect against multiple sperm penetrating the egg.
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.
A mesmerizing 6-minute time lapse shows a single cell dividing seemingly endlessly until what was once a yellow blob has become a wriggling, darting salamander tadpole.
Meiosis is a specialized form of cell division that produces reproductive cells, such as plant and fungal spores, sperm and egg cells.
Men's testes were once thought to be free of bacteria, but a small new study suggests that microbes may live naturally in this part of the male reproductive system.
Human sperm cells are well-studied, so scientists were completely surprised to find a previously unknown structure in the little swimmers.
A lack of new babies for endangered Northern Atlantic right whales makes their future even more uncertain.
This may be the most important system in the body. Without the ability to reproduce, a species dies.
A woman in Arizona who was born without a vagina — the result of a rare condition — is speaking out about her condition.
In a surprising case, a drug that is normally toxic to ovaries actually helped one woman get pregnant.
Diatoms, long thought to reproduce asexually, do engage in sexual reproduction, with ammonium acting as an aphrodisiac.