Inclusion Criteria:
- BMI > 30 kg/m2
- Age < 38 years old
- Non smokers
- First IVF cycle (groups 2 & 3, not Control group)
- Normal uterus (seen by ultrasound)
- normal basal hormonal profile(FSH,LH,estradiol,testosterone,androstenedione, insulin,
SHBG, glucose, AMH)
- Antral follicle count(> 5 FA for each ovary)
- Menses every 25-35 days.
Exclusion Criteria:
- < 5 or > 20 oocytes retrieved after stimulation cycle
- estradiol >3000 pg/ml or progesterone > 1,5 ng/ml on the hCG day.
- < 2 evolutive embryos in the culture medium.