Some girls may first ovulate even before they menstruate.
有些女孩初次排卵可能甚至早于她们的月经。
Lean, hard-training women athletes may menstruate less frequently or not at all.
清瘦、训练艰苦的女运动员行经可能不那么频繁或根本没有月经。
Lean, hard-training women athletes may menstruate less frequently or not at all.
清瘦、训练艰苦的女运动员行经可能不那么频繁或根本没有月经。
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