A pair of crater-like spheres seen in an egg after insemination; their presence indicates that fertilization has occurred.

Fertilization of an egg by more than one sperm.

A small cell produced and ultimately discarded in the development of an egg. Polar bodies can be removed for genetic analysis.

The process of retrieving sperm from the epididymis of the males by placing a small needle through the skin of the scrotum.

Refers to a series of complex steps allowing development of an egg. The timing of egg retrieval and fertilization is dependent on ovum maturity.

Egg (plural is ova).

The organ which is responsible for egg and female hormone production.

The process of retrieving sperm from the epididymis of the male through a small incision on the scrotum.

Liquid nutrient mixture in which the eggs, sperm and embryos are cultured and grown.

Process where the egg and sperm are fertilized outside the woman’s body. The embryo is later transferred into the woman’s uterus or fallopian tube.