They have adopted an academic term, neijuan or " involution" , to describe how extra input no longer yields more output.
他们用了一个学术型术语“内卷”形容投入并不能带出这一情况。
Sometimes the several-hours after delivery is called the " fourth stage" , because there are major physiologic changes like adaption to the blood loss, and the start of uterine involution, where the uterus begins returning to its pre-pregnant state.
有时分娩后几个小时称为“第四程”,因为有很重要的生理变化,例如血液流失的适应,以及子宫复旧的开始,子宫回到前的状态。