Methods : 38 cases ( 38 cycles ) including 30 cases of sterility with tubal factor and 8 cases of sterility with unknown reasons were studied in the aspect of fvf - et in our reproductive center 方法: 2000年11月至2001年7月在我生殖医学中心进行体外受精和胚胎移植的患者共计38人, 38个周期。