In-vitro-fertilisation, IVF. Form of extracorporal insemination. Fertilization of the ovum occurs outside of the body (in vitro) inside a nutrient solution.
For IVF a mature ovum is taked from a (hormonally stimulated) ovary via laparoscopy and then sperm is introduced (here by needle, which is done in cases of missing motility).
About 48 to 72 hours after fetilization embryos (today mostly one or two)(in the 4 to 8 cell state) can be introduced into the uterus. Implantation is supported via hormone therapy.
IVF is, for example, used if the natural path between uterus and ovaries is damaged or blocked.