Finally, endocrine disorders can also cause primary amenorrhea.

最后，内分泌疾病也会导致原发性闭经。

Ok, now, coming back to amenorrhea.

好，现在说回到闭经。

A rarer cause of primary amenorrhea is androgen insensitivity syndrome.

导致原发性闭经的一个罕见原因是雄激素不敏感综合征。

Issues with the pituitary gland can also cause secondary amenorrhea.

垂体的问题也会导致继发性闭经。

Which would explain why amenorrhea is most common among ballet dancers, gymnasts, and long distance runners.

这也能解释为什麽闭经对芭蕾舞者 体操选手及长跑运动员来说很常见。

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。

The most common cause of secondary amenorrhea is pregnancy.

最可能的继发性闭经原因是怀孕。

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。

The most common cause of primary amenorrhea is Turner syndrome, where one X chromosome is either completely or partially absent.

最可能的原发性闭经原因是Turner综合征：有一个X染色体完全或者部分缺失。

Another condition that affects the hypothalamic-pituitary-ovarian axis and can be responsible for secondary amenorrhea is polycystic ovary syndrome.

另一种能影响下丘脑-垂体-卵巢轴并可能导致继发性闭经的疾病是多囊卵巢综合症。