I find it interesting that the Chinese made it, like wow its kinda brilliant to kill off people but it really doesn't have as bad effects on the younger gen then it does on the older gen. You'd think they'd rather kill off the younger gen bc their our future right?
It could possibly be a Heavy period. Heavy periods can have causes that aren't due to underlying disease. Examples include regular variation among individuals, hormonal imbalance, IUD use, or medication side effects.