The system entails checking and stimulating a woman's ovulatory procedure, removing an ovum or ova (egg or eggs) from her ovaries and allowing sperm fertilise them in a society medium in a laboratory. In vitro fertilisation (IVF) is a method of fertilisation the place an egg is put together with sperm in vitro ("in glass"). This is utilised when sperm has difficulty penetrating the egg. ICSI is also employed when sperm numbers are very minimal.