Validation of Donor Oocytes Semi-automated Vitrification

The oocytes will be stored in closed devices (Rapid I® straws for the manual vitrification protocol or pods® in cassettes for the semi-automatic vitrification protocol) in liquid nitrogen. All samples are anonymized in the context of oocyte donation by the medically assisted procreation (PMA) department of Clermont-Ferrand University Hospital, according to the method usually used. The oocyte survival rate will be evaluated by the service technician or biologist. This survival rate corresponds to the ratio between the number of oocytes intact 2 hours after warming and able to be microinjected with a spermatozoon (ICSI), and the number of oocytes heated, after vitrification. We will compare the oocyte survival rate after vitrification and semi-automatic warming vs. after manual vitrification. The investigator will compare the effectiveness of ART with oocyte donation during semi-automatic vitrification of oocytes compared to the manual technique, with regard to: * Oocyte functional quality after warming evaluated by the fertilization rate of oocytes after ICSI * Early development of embryos: * the number of embryos cleaved on the 2nd day of culture from vitrified oocytes, the blastulation rate defined by the ratio between the number of blastocysts obtained (Gardner classification on the 5th day of culture) and the total number of cleaved embryos. These parameters will be assessed daily during the embryo reading by a technician or a biologist from the ART department. We will also compare the effectiveness of ART with oocyte donation during the semi-automatic vitrification of oocytes compared to the manual technique, with regard to: * The implantation rate of embryos from vitrified oocytes, defined by the ratio between the number of embryo sacs observed (6th week of amenorrhea) and the number of embryos transferred * The rate of miscarriages in oocyte recipients. These parameters will be evaluated by a biologist from the ART department after the results of the beta hCG of the patients and the performance of the ultrasound at the 6th week of amenorrhea by the gynecologists of the ART department.