On the date offollicle puncture a couple come together. The husband provides sperm. An essential condition is abstaining from sex for three days before the puncture. The sperm is prepared in a special way, the healthiest male gametes are chosen. Oocytes obtained in the course of follicle puncture are kept in special cups with nutrient medium, which are placed in an incubator, where the conditions, similar to those of the mother’s organism, are maintained (the same temperature, carbon content).