月经频率异常 (oligomenorrhea) 月经频发<21-24d (polymenorrhea ·月经稀发>35-40d (oligomenorrhea 闭经 >6m amenorrhea月经频率异常 （oligomenorrhea） • 月经频发 <21-24d (polymenorrhea) • 月经稀发 >35-40d (oligomenorrhea) • 闭经 >6m (amenorrhea)