RESUMO
To correlate four estrogen receptor beta polymorphisms to endometrial thickness. 24 patients with consistently thin endometrium, in natural and stimulated cycles undergoing controlled ovarian hyper stimulation for ICSI for various indications and 50 control subjects with normal endometrium undergoing COH for ICSI for male factor infertility. Sonographic evaluation of endometrium, PCR on peripheral blood leucocytes using specific primers to detect the determined four polymorphisms, as well as hormone values in COH cycles and ICSI outcome, are recorded. The deletion polymorphism was not found in either groups. The second polymorphism [P846] was significantly more commonly detected in cases of normal endometrium [50% versus 8% in cases with thin endometrium]. The third polymorphism [P1082] was not found in control group and only one case [4%] with thin endometrium and this was not significant. The last silent polymorphism [P1421] was found in 8% of cases and surprisingly all subjects of control group and this was statistically highly significant. The presence of certain ER beta polymorphisms correlate with good endometrial thickness