translation.en: And so this really stunned him and he looked sort of puzzled and I said, "You may not know this, but pregnancy due dates are calculated assuming that you have a standard 28-day cycle, and my cycle ranges — sometimes it's 27, sometimes it's up to 38 — and I have been collecting the data to prove it.
translation.zh: 这句话真的惊到他了 他看起来非常的困惑 我接着说，“你可能不知道 但是预产期的计算是 基于28天的生理周期 而我的月经周期不规律 从27天到38天不等 而且我有自己的周期记录来证明这一点