What factors can cause uterine atony

Factors leading to uterine atony: the first is mental state, such as excessive tension, fatigue, or labor stagnation during labor, can lead to uterine atony; second, insufficient nutrition supply, do not drink water, do not eat, can also lead to uterine atony; third, fetal position is not correct, because the uterus frequently contracts, the fetal head still does not decline, leading to uterine has been working, may also lead to uterine atony; Fourth, others, such as fetal size, polyhydramnios, twins, etc., may lead to uterine contractility.