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，第一征的碍包括闭经，即无月经，或月经减少，即月经周期不规则。

Bulimia can also lead to endocrine changes, the most common of which is menstrual irregularities in women, who might even develop amenorrhea, where either the normal menstrual cycle stops or menstruation doesn't start by age 15.

暴食症也可导致内分泌异常，最常见的是的月经失调，甚至会发展成闭经，即月经周期全部停止或15岁仍无月经初潮。