Patient and cycle characteristics.

COC: cumulus oocyte complex; Relative E2: E2/COC retrieved; Ovarian Response: (COC retrieved/Gonadotrophine dose) x 100; Oocyte Maturity: proportion of MII/COC retrieved; 2PN: proportion of 2PN/intact oocytes after ICSI; ≥7cell day3 = proportion of embryos with at least 7 cells on day3/2PN; Low Fragmentation: proportion of embryos with <10% fragmentation on day3/2PN; Good Quality Embryos: proportion of embryos on day 3 with <10% fragmentation and at least 7 cells/2PN; a Serum values as measured on day of hCG; ns: P>0.05; SD = standard deviation.