In-vitro-Fertilization (IVF) is a common infertility treatment. During the procedure, a fertility doctor takes the eggs from the ovaries using a small needle and fertilizes them with sperm in a specialized lab. After fertilization happens, the eggs develop into embryos. Three to five days later, the specialist re-implants the embryos back into the uterus.
IVF is never the first step in the treatment of infertility except in cases of complete tubal blockage. Instead, it's reserved for cases in which other methods such as fertility drugs, surgery, and artificial insemination haven't worked.