对20名生育妇女和40名月经规则不育妇女连续3个周期的卵泡发育和排卵超声观察．结果显示：不育组中30例（75％）出现异常周期，占总周期的48.3％，明显高于生育组的同期发生率（5％）．而且有13例（32．5％）连续3个周期出现异常。作者认为：持续反复出现异常周期（无排卵、小卵泡及黄体化卵泡未破周期）是妇女不育的重要原因。值得临床重视。 Observation of follicular development and ovulation by three consecutive cycles of 20 fertile women and 40 women with regular menstruation. The results showed that 30 cases (75%) of infertility group had an abnormal cycle, accounting for 48.3% of the total cycle, which was significantly higher than that of the reproductive group (5%). And 13 cases (32.5%) showed abnormal for 3 consecutive cycles. The author believes that: repeated abnormal cycles (anovulation, small follicles and luteal follicular unbroken cycle) is an important cause of infertility in women. It is worth clinical attention.