1·I thought the pain, the headaches, and the missed menstrual periods were normal.
我认为痛苦、头痛、和停经都是正常的。
2·Many women experience menstrual cramps just before and during their menstrual periods.
很多女性在经期前或经期期间会有痛经的经历。
3·Girls who have gotten their periods lose some iron every month through their menstrual flow and active kids lose iron through their sweat - weird!
女孩会在每月时期经期失去一些铁而好动的小孩子会通过流汗失去铁——挺奇怪的！