The one symptom of both primary and secondary amenorrhea is, well, the absence of menstruation.

原发性和继发性闭经共有的一个症状是没有月经。

All right, as a quick recap… amenorrhea is the abnormal absence of menstruation in females of reproductive age.

好！快速回顾一下：闭经指育龄期女性无月经或月经异常停止。

In females, primary sex characteristic dysfunction includes amenorrhea or absence of menstruation, or oligomenorrhea or irregular menstrual cycle.

在女性中，第一性征的功能障碍包括闭经，即无月经，或月经减少，即月经周期不规则。