Effect of endometriosis on IVF outcomes in cases of single embryo transfer for first IVF attempt in patients under 35

BackgroundImplantation disorders are regarded differently in different groups undergoing in vitro fertilization (IVF) because of heterogeneous patient populations. To avoid this problem, this study was based solely on the first attempts of a single embryo transfer in patients under the age of 35.MethodsThis was a retrospective comparative study with 2 groups of patients: a group with endometriosis (n = 288) and a group without endometriosis (n = 1,368), registered from January 2010 to December 2013 in the IVF center of the University Hospital of Clermont-Ferrand. This study compared the 2 groups and subgroups according to ovarian response and embryo quality, and analyzed oocyte number, embryo number, transfer rate, implantation rate and delivery rate per ovum pick-up and per transfer.ResultsIn the cases of endometriosis, the number of collected oocytes (8.37 ± 7.01 vs. 10.13 ± 6.53 p<0.001), the transfer rate (81.4% vs. 86.1%, p = 0. 045) and the rate of cycles with a frozen embryo (48.9% vs. 57.3%, p<0.0...