Furthermore, just as happens inside immune cells that target microbes ... a single sperm is injected into the egg to increase ...

If the egg cell does not meet with a sperm cell in the oviduct, the lining of the uterus begins to break down and the cycle repeats. Fertilisation happens if the egg cell meets and joins with a ...

It produces the female egg cells, called the ova or oocytes ... If intercourse has taken place and sperm has fertilized the egg (a process called conception), the fertilized egg (embryo) will ...

The first weeks after a sperm fertilises an egg is a period ... form unless the early placenta cells can surround it. There is even talk of improving in vitro fertilisation (IVF) success rates ...

Previously this has been thought impossible as cells have two sets of chromosomes, whereas sperm has only one. In natural fertilisation, the two sets of chromosomes in an egg are separated and one ...

People donate their eggs and sperm for a variety of reasons. It could be to help people who are unable to conceive a child ...

A novel molecular tool developed by a Lehigh University professor of biological sciences is enabling scientists to precisely ...

A company called Gameto claims to have successfully matured eggs outside of the female body, a development that could revolutionize the in vitro fertilization ... egg and sperm cells essentially ...

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 ...

An innovative fertility technology using stem cells to help an embryo ... In conventional IVF, mature eggs are collected from ovaries and fertilized by sperm in a laboratory.

Human Immunodeficiency Virus (HIV) is a chronic infection that mainly affects the immune system, making it harder for the body to fight infections. Although HIV is most widely known for its ...