1. The definition and significance of in vitro fertilization IVF refers to the process of fertilizing eggs and sperm outside the body through artificial assisted reproductive technology, and then transplanting the fertilized eggs into the mother\’s body to develop into a fetus. The emergence of in vitro fertilization technology has brought good news to many infertile couples, allowing them to realize their dreams of having children. It also provides a lot of valuable data for medical research. 2. Indications of IVF 1. Ovulation