(单词翻译:单击)
Around age 9 to 13, girls enter puberty and have their very first period.
大约9至13岁，女孩进入青春期，迎来第一次月经。
From this day forward, their hormone levels fluctuate, affecting their body, brain and behavior — a phenomenon known as the menstrual cycle.
从这一天起，她们的激素水平开始波动，影响她们的身体、大脑和行为——这种现象称为月经周期。
The menstrual cycle is divided into 4 phases: Menstruation, follicular phase, ovulation with a fertile window, and the luteal phase.
月经周期分为4个阶段：月经期、卵泡期、排卵期以及黄体期。
The length of the cycle is, on average, 28 days. However, for most women it ranges somewhere between 22 and 35 days and can be regular or not.
平均周期长度为28天。但是，对于大多数女性来说，周期长度在22至35天之间，可能规律也可能不规律。
Since menstruation is a consequence of changes that happen before it, we will start our story with the follicular phase.
由于月经是月经前发生的变化的结果，因此我们将从卵泡期开始讲述我们的故事。
During the Follicular phase, the hormone estrogen increases steadily and Leah starts to feel happy, is physically stronger, and is generally on top form.
在卵泡期，雌激素稳步增加，Leah开始感到快乐，身体更强壮，并且通常处于最佳状态。
Inside her body, her uterine lining starts to thicken and in the ovaries, her follicles mature. Inside one of them is a tiny cell that's about to become an egg.
在她的体内，子宫内膜开始变厚，在卵巢中，卵泡开始成熟。其中有一个即将变成卵子的微小细胞。
At the end of this phase, Leah notices a change in her discharge. During Ovulation the ovary releases the egg, which makes its way towards the uterus and then implants itself inside the lining.
在此阶段结束时，Leah注意到她的分泌物发生了变化。在排卵期间，卵巢会释放卵子，卵子会向子宫移动，然后植入子宫内膜内。
For about 5 days, Leah could potentially get pregnant. The high levels of estrogen make Leah more interested in boys than she used to be, which is why she is more conscious about her appearance.
大约5天后，Leah可能会怀孕。高水平的雌激素使Leah对男孩的兴趣比以前更大，这就是她更注重外表的原因。
Her senses are heightened and she hears, sees, tastes and smells more acutely. In the Luteal phase, her body temperature rises slightly.
她的感官更加敏锐，她听到、看到、尝到和闻到的东西都更加敏锐。在黄体期，她的体温略有升高。
Leah has more sensitive, swollen breasts, and occasional joint pain, which makes skateboarding harder.
Leah的乳房更加敏感、肿胀，偶尔还会有关节疼痛，这让玩滑板变得更加困难。
Like just about every other woman, Leah can now experience premenstrual syndrome.
像几乎所有其他女性一样，Leah现在可能会经历经前综合症。
If it's bad, she wants to be alone, feels moody, and can have thoughts that keep her up at night. If there is no pregnancy, Leah's uterus sheds her thickened lining.
如果情况不好，她会想独处，情绪低落，晚上会有一些让她无法入睡的想法。如果没有怀孕，Leah的子宫会脱落增厚的内膜。
As a result she experiences bleeding and often painful cramps. This marks the first day of menstruation. Leah is now exhausted.
因此，她会出现出血和经常疼痛的痉挛。这是月经的第一天。Leah现在筋疲力尽。
She has trouble concentrating, is not motivated, and can't do sports, which annoys her a lot. But soon after she starts feeling better and the cycle continues.
她很难集中注意力，没有动力，也不能做运动，这让她很烦恼。但不久之后，她开始感觉好些，月经周期继续。
Every young woman experiences a different version of the menstrual cycle, with periods ranging from little to no discomfort, to heavy bleeding and intense pain.
每个年轻女性都会经历不同的月经周期，从轻微不适到无不适，再到大量出血和剧烈疼痛。
And about 1 in 10 girls will have to deal with what's known as endometriosis.
大约十分之一的女孩将不得不应对所谓的子宫内膜异位症。
Endometriosis is a condition where tissue grows outside the uterus. This can lead to severe and lasting pain during their menses, intercourse, or on the toilet.
子宫内膜异位症是一种组织在子宫外生长的疾病。这会导致她们在月经期间、性交或上厕所时出现严重而持久的疼痛。
And eventually it can even lead to infertility. What do you think? How does the menstrual cycle influence your life, or the life of your partner or friend?
最终甚至会导致不孕。你怎么看？月经周期如何影响你的生活，或你的伴侣或朋友的生活？
And how can society support women and girls who experience regular periods of pain and fatigue? Share your thoughts in the comments below!
社会又该如何支持那些经常经历疼痛和疲劳的妇女和女孩呢？请在下方评论中分享您的想法！
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