This method consists of the fertilization of the ovum by the sperm in an artificial medium, however it is a natural fertilization process, since thousands of sperm are placed around an ovule, which is penetrated naturally by one of them.

This technique consists of several phases:

• Controlled Ovarian Stimulation.
• Eggs Recovery.
• Obtaining sperm.
• In Vitro Fertilization.
• Embryo development.
• Transfer of embryos to the maternal uterus.