The reason for weak uterine contractions is actually them!

The degree of uterine contraction during delivery determines the speed of the baby's delivery. Some women will experience uterine contraction weakness in cases of cephalopelvic disproportion, uterine hypoplasia, excessive mental stress, etc., which will have an adverse effect on delivery.

1. Cephalopelvic disproportion or abnormal fetal position causes obstruction in the descent of the fetal presenting part and cannot be close to the lower uterine segment and cervix, thus failing to induce reflex uterine contraction, leading to secondary uterine atony.

2. Uterine factors

Uterine hypoplasia, uterine malformations (such as bicornuate uterus, etc.), excessive expansion of the uterine wall (such as twins, macrosomia, polyhydramnios, etc.), uterine muscle fiber degeneration or uterine fibroids in multiparas, etc., can all cause uterine atony.

3. Mental factors : For primiparas (especially elderly primiparas over 35 years old), excessive mental stress can cause dysfunction of the cerebral cortex, lack of sleep, eating less after delivery, and excessive physical exertion, all of which can lead to weak uterine contractions.

4. Endocrine disorders

After delivery, the mother's body secretes insufficient estrogen, oxytocin, prostaglandins, acetylcholine, etc., the progesterone level decreases slowly, and the uterus' sensitivity to acetylcholine decreases, all of which can affect the excitation threshold of the uterine muscle and cause uterine contraction weakness.

5. Influence of drugs: Inappropriate use of large doses of sedatives and analgesics after delivery, such as morphine, chlorpromazine, pethidine, barbiturates, etc., can inhibit uterine contractions.

prevention

Pregnant women should be given prenatal education to relieve their worries and fears and make them understand that pregnancy and childbirth are physiological processes. At present, both at home and abroad, there are recreational delivery rooms (to allow the mother's spouse and family members to accompany her) and family wards, which help to eliminate the mother's tension, enhance her confidence, and prevent uterine contractions caused by mental stress. During labor, eating more is encouraged, and nutrition can be supplemented intravenously if necessary. Avoiding excessive use of sedatives and paying attention to checking for cephalopelvic disproportion are effective measures to prevent uterine atony. Pay attention to emptying the rectum and bladder in time. If necessary, warm soapy water enema and catheterization can be performed.