[Relationship between body mass index and outcome of in vitro fertilization and embryo transfer cycle in patients with endometriosis].

OBJECTIVE: To explore the relationship between body mass index (BMI) and clinical outcomes of in vitro fertilization and embryo transfer (IVF/ICSI-ET) cycles in patients with endometriosis. METHODS: We retrospectively analyzed the data of infertile women with endometriosis undergoing 244 IVF/ICSI-ET cycles between January, 2011 and August, 2012. The patients, categorized into 3 groups with mild endometriosis, moderate to severe endometriosis, and no endometriosis (control), underwent a long protocol, and the relationship of the general conditions, dose of gonadotropin, days of stimulation, BMI, number of oocytes retrieved and embryos transferred with the outcome of IVF were analyzed. RESULTS: There was significant difference between moderate to severe endometriosis group and the control group in the number of ampules, oocytes retrieved and embryos transferred. The patients with moderate or severe endometriosis had significantly lower BMI and clinical pregnancy rate than those with mild or no endometriosis. CONCLUSION: Endometriosis is inversely correlated with BMI, and BMI of the patients with endometriosis may affect the pregnancy rate of IVF cycles.