Pregnancy of a surrogate mother can occur in two ways. The first method involves the use of the egg of the surrogate mother and the sperm of the intended father. In the second method, an embryo created in a laboratory from sperm and eggs of the intended parents is transferred to the uterus of the surrogate mother. In the second method, the surrogate mother is not genetically related to the child, and therefore it is considered the most common. The stages of this method begin with egg donation, the intended mother or donor undergo an egg retrieval procedure. Then, in the laboratory, the ovum is fertilized with the sperm of the intended father or donor, resulting in the formation of embryos. These embryos can be transferred fresh into the surrogate mother’s womb if the surrogate mother’s cycles are synchronized at that time. Is it possible to transfer an embryo thawed later from storage into the uterus of a surrogate mother prepared with hormonal preparations. In addition, the surrogate mother must meet a number of criteria, she must be between the ages of 21 and 41, have at least one child of her own and an uncomplicated pregnancy, have the support of her family for her participation in the program, and meet medical and psychological indicators.