Parthenogenesis is a type of asexual reproduction in which offspring (progeny) arise from unfertilized eggs. The phenomenon is known among many invertebrate and vertebrate groups, including some species of nematodes, gastropods, crustaceans, insects...

In most living things, fertilization occurs when the gametes of two compatible creatures are brought together. In mammals, these gametes are the (female) egg and the (male) sperm. When they meet, the egg and sperm will fuse into one body, allowing...

(from Greek, parthenos: a virgin, genesis: production) The process of reproduction in unisexual species; see...

Parthenogenesis (from the Greek παρθένος parthenos, "virgin", + γένεσις genesis, "creation") is an asexual form of reproduction found in females where growth and development of an embryo or seed occurs without fertilization by males. The...

Remember the spectacular South Korean stem cell fraud of a few years ago? A new analysis says the disgraced scientist actually did reach a long-sought scientific goal. It's just not the one he claimed.The new study suggests Hwang Woo-suk and his team produced stem cells...

A British zoo announced Wednesday the virgin birth of five Komodo dragons, giving scientists new hope for the captive breeding of the endangered species.In an evolutionary twist, the newborns' eight-year-old mother Flora shocked staff at Chester Zoo in northern England when she became pregnant without...

A procedure that encourages an egg to begin embryo development without being fertilized could suggest a new way to produce stem cells, at least for certain patients.Researchers were able to get stem cells using unfertilized mouse eggs, they report in Thursday's online issue of the...

Veterinarian Bob George sliced open the dead shark and saw the outline of a fish. No surprise there, since sharks digest their food slowly. Then George realized he wasn't looking at the stomach of the blacktip reef shark, but at her uterus. In it was...