The most common cause of secondary amenorrhea is pregnancy.

最可能的继发性闭经原因是怀孕。

Issues with the pituitary gland can also cause secondary amenorrhea.

垂体的问题也会导致继发性闭经。

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。

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。

There are many causes of secondary amenorrhea, and when they occur before menarche, all of these can also cause primary amenorrhea.

有许多原因会导致继发性闭经，而当它们在初潮前发生时，都会导致原发性闭经。

The first step when evaluating primary or secondary amenorrhea is to rule out pregnancy with a pregnancy test.

评估原发性或继发性闭经的第一步是用孕检排除怀孕可能。

Sometimes though, menstruation either never starts which is called primary amenorrhea or suddenly stops in a person who's previously menstruating which is called secondary amenorrhea.

而有时，（青春期后）月经从未出现，这被称为原发性闭经；或是原先有月经周期，但突然停止，这就被称为继发性闭经。

Causes of secondary amenorrhea can also cause primary amenorrhea, and they include functional hypothalamic amenorrhea, polycystic ovary syndrome, hyperprolactinemia, premature ovarian failure and Asherman syndrome.

继发性闭经的病因也可以导致原发性闭经，包括功能性下丘脑性闭经、多囊卵巢综合症、高泌乳素血症、卵巢早衰以及Asherman综合征。

Now, sometimes secondary amenorrhea can occur because of premature ovarian failure - which is when the ovarian follicles undergo accelerated atresia and get depleted before the age of 40, resulting in early menopause.

有时，继发性闭经的原因是卵巢早衰，即当卵巢滤泡加速闭锁，在40岁前消耗殆尽，造成提前绝经。

Finally, a structural cause of secondary amenorrhea is intrauterine adhesions, or Asherman syndrome, which is when there is scar tissue inside the uterine cavity, typically in a female that has undergone uterine instrumentation in the past.

最后，继发性闭经的一种解剖结构性病因是宫腔粘连，即Asherman综合征，也就是宫腔内存在疤痕组织，典型的原因是女性曾经有过子宫有创检查。