 This study will be conducted at the gynecology and infertility department of Kanuni Sultan Süleyman Training and Research Hospital from 2016 to 2017. The approval of the local Institutional Review Board KAEK2016.22.31 was obtained in June 2016 and informed consents of all subjects have been prepared. RM is defined as three or more pregnancy losses at 20 weeks of gestation or fetal weight 500 g. Women with history of RM for whom routine workup for RM chromosomal analyses of both partners; levels of prolactin and TSH; anticardiolipin antibody, lupus anticoagulant, antinuclear antibody, and coagulation studies; and pelvic ultrasonography is negative are assigned to the RM group. The control group consists of healthy women with no history of RM who are seeking contraception in the centers family planning unit. To keep the power of the study at 80 with an alpha-level of 0.05, a sample size of minumum 60 patients in each group was required. 