IN a previous communication1 the presence of an inhibitor of cytochrome oxidase in the unfertilized sea urchin egg was described. It was shown that its activity decreases considerably following ...

They are working on ways to coax unfertilized eggs to grow into embryos that produce stem cells--the very cells that have raised so much hope for their potential to cure disease.

About this article Cite this article FERNLUND, P., JOSEFSSON, L. Purification and Characterization of Ribonuclease from Unfertilized Eggs of the Sea Urchin, Psammechinus miliaris.

Scientists say they’ve created embryonic stem cells by stimulating unfertilized eggs, a significant step toward producing transplant tissue that’s genetically matched to women.

The new source is the unfertilized eggs that can be harvested from ovaries. The idea is to trick an egg into dividing as if it had been fertilized by a sperm.

Scientists say they’ve created embryonic stem cells by stimulating unfertilized eggs, a significant step toward producing transplant tissue that’s genetically matched to women. The advance ...

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.

One of the mysteries of parthenogenesis -- the development of an unfertilized egg into an adult -- has been the origin of the centrosome, an essential cellular component that is ordinarily derived ...

A virgin mouse has given birth to babies that were conceived from an unfertilized egg, as part of a groundbreaking new study. The experiment, which was conducted by researchers at Shanghai Jiao ...

Scientists have long known that the social insects in the order Hymenoptera–which includes ants, bees, and wasps–have an unusual mechanism for sex determination: Unfertilized eggs develop into males, ...

Scientists have for the first time obtained long-lived stem cells from monkey eggs stimulated to undergo parthenogenesis.

Kuo and his colleagues recently discovered that sea urchin sperm, especially the heads, contain an enzyme that can synthesize the gas.