Under normal circumstances, if there is no regular contraction and the amniotic fluid breaks after full-term, it is known as premature rupture of membranes. Regardless of the period, if premature rupture of membranes occurs, active symptomatic treatment is necessary. Normally, premature rupture of membranes may involve sudden vaginal discharge caused by various reasons. The amount of discharge can vary, usually being continuous, with the duration also varying. It starts with a large amount, then gradually decreases, with a few cases being intermittent. The vaginal discharge is usually related to changes in the pregnant woman's posture or activity. It can be seen that fluid leaks from the vaginal opening, or flows out from inside the vagina during upper fetal head push, pressing on the fundus, or when the posture of the pregnant woman changes. This condition can then be confirmed as premature rupture of membranes.