The Blastocyst Utilization Rate Is Reduced For Women At Risk Of Ovarian Hyperstimulation Syndrome During In Vitro Fertilization Treatment

Women at risk of ovarian hyperstimulation syndrome (OHSS) in an IVF programme, i.e. serum oestradiol >20,000 pmol/l or >20 oocytes collected, had all embryos cryopreserved to avoid exacerbation of the condition by pregnancy. This group was compared with oocyte donors (whose resulting embryos were all cryopreserved for quarantine reasons) and fertility patients not at risk of OHSS. As expected, the OHSS group had significantly more oocytes collected than the donors or non-OHSS patients (both p