IT will be a glad day for the science of embryology when all the details of the sequence of the development of man are described from successive stages of the human ovum and embryo. The chick has ...

This is a fertilized human egg, prior to division. Two nuclei (one from the egg and one from the sperm) can be seen in the center. Disclaimer: AAAS and EurekAlert! are not responsible for the ...

Male and female reproductive systems allow human reproduction. Fertilisation occurs when a sperm and egg join to form an embryo. An embryo develops into an unborn baby in the uterus during pregnancy.

"This is really a textbook image of a human day-14 embryo," Prof Hanna says, which "hasn't been done before". Instead of a sperm and egg, the starting material was naive stem cells which were ...

"But apart from any clinical applications, this is a big breakthrough in improving understanding of human egg development." A lab-grown, human egg made by scientists at the University of Edinburgh ...

The female gamete is called an ovum or egg. The plural is ova. Ova are produced from germline cells in the ovaries. Ovaries contain immature ova at various stages of development. Each ova is ...

It involves a cocktail of chemicals acting as an 'artificial sperm' to trick a human egg into forming an embryo. The stunning discovery has alarmed medical ethics campaigners, who described it as ...

In 1827, with the discovery of the human ovum, the mistaken biology of Aristotle was discredited. Scientists increasingly understood that the union of sperm and egg at conception produces a new ...

Artificial ovaries are on the horizon after scientists created the first cellular-level map of human egg formation. The University of Michigan used five donated ovaries to carry out state-of-the ...

A person shall not purchase or offer to purchase a human egg or sperm for human somatic cell nuclear transfer or for any purpose other than treating human infertility or for clinical investigation ...

Two weeks after a human egg is fertilized, primordial germ cells (PGCs), which develop into sperm and eggs, are formed. In six to 10 weeks after fertilization, PGCs differentiate into pro ...