Adverse events and serious adverse events (SAEs) will be assessed if spontaneously reported by the subjects at all study visits: during an optional telephone consultation between screening and the beginning of treatment, ultrasound scan (Day -7-0), OPU (Day 2), telephone consultation (Day 3), embryo transfer (Day 4-7), telephone consultation (Day 16), scan week 12 (assessed 10 weeks after hCG administration), post-treatment safety follow-up, 1-Year follow-up, and at early termination (if applicable).