 A prospective RCT will be performed, including patients undergoing dIUI under ovulation induction. The trial is established to compare two inseminated volumes, 0.2 ml control group and 0.5 mL study group, and will be conducted at the Reproductive Medicine Service of the Dexeus Womens Health Center. The Institutional Review Board has approved the research project and an informed consent will be obtained from all patients participating to the study. 