Effect of a Multivitamin Supplement With Probiotic (Seidivid Ferty4®) on Oocyte Retrieval and Quality

Patients will be recruited on the day they are going to start the egg donation program. The patient will start taking the study treatment (multivitamin supplement with probiotics or placebo) immediately after inclusion and will call the site to initiate the oocyte donation protocol approximately 30 days after enrollment. Throughout the COH period of the protocol the patient will continue taking the study supplement (or placebo), without interruption until the day of the GnRH-agonist trigger. The administration of the agonist will be as a single dose, 36 hours before follicular puncture for the retrieval of mature eggs. Then, the retrieved oocytes will be denuded and examined by light microscopy to assess their quality. The evaluation will carried out by two different embryologists, blinded to the study protocol.