The aim of this study was to investigate the impact of anti-thyroid peroxidase antibodies (Anti-TPO) on the fertilization and embryo transfer (IVF-ET) outcome in women with poor ovarian reserve but normal thyrotropin levels. A total of 300 patients with poor ovarian reserve undergoing ICSI cycle from April 2015 to December 2017 were analyzed retrospectively. Subjects were divided into two groups: Group 1: Women with early ovarian aging, Group 2: Women with age related poor ovarian reserve. All subjects underwent anti-thyroid peroxidase antibody (anti-TPO) analysis. The impacts of age and anti-TPO positivity on cycle outcome were assessed. There were no significant differences in basal FSH, basal AMH levels, and antral follicle count between the two main groups. Groups were also comparable in terms of the duration of ovarian stimulation, peak estradiol level, starting gonadotropin dose, total gonadotropin dose, and number of oocytes retrieved. Clinical pregnancy and cycle cancelation rates were significantly higher in group with age-related poor ovarian reserve. While autoimmune thyroid disease rate was significantly higher in group with early ovarian aging. Anti-TPO positivity was a risk factor for poor cycle outcome [RR: 2.8 (95% CI: 1.2-6.3)]. Early ovarian aging may be associated with poorer cycle outcome compared to group with age-related poor ovarian reserve. This difference may be associated with high rate of autoimmunity which led to the impaired endometrial receptivity.
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