Fertil Steril. 2004 Jul;82(1):266-72. doi: 10.1016/j.fertnstert.2004.02.098.
Amenorrhea is the absence or abnormal cessation of the menses. Primary and secondary amenorrhea describe the occurrence of amenorrhea before and after menarche, respectively.
闭经是指月经缺失或月经异常停止。原发性闭经和继发性闭经分别描述初潮之前和之后闭经的发生情况。