Methods 194 infertility patients underwent COH because of uterine tube and their serum estradiol were measured on the day of hCG administration(day-of-hCG) and the day of embryo transfer(day-of-ET).

• 方法194例因输卵管因素不孕的患者行COH；注射人绒毛膜促性腺激素(hCG)日及ET日测定血清雌激素水平；依其比值分为3组:组1:hCG日E2(雌二醇)/ET日E2<2.；0;