How long does the pain of the uterine contraction injection last?

If pregnant women do not experience uterine contractions when they are about to give birth, they will be given a uterine contraction injection. This drug will cause the uterus to contract after the injection, and the duration of the pain varies from person to person. Many people will feel pain for about half an hour before they can start giving birth, so pregnant women must be mentally prepared.

The process of cervical dilation is relatively slow. Usually, the cervix gradually flattens in the second week after the 9th month of pregnancy, which is also the process of cervical formation. Your cervix will dilate to 10 centimeters when your baby is born. It will be slow at the beginning. It takes an average of 8 hours from labor to 1 centimeter dilation, and an average of 4 hours from 6 centimeters to 10 centimeters. Generally speaking, some medication will not be used to treat the pain until the cervix is ​​dilated to centimeters. This indicates that the mother has entered the active phase of labor. The cervix has dilated to 6 cm, the cervix has become soft, thin, and elastic, and each contraction is 2-3 cm apart. After delivery, the cervix will gradually dilate with regular uterine contractions.

The first stage of labor is divided into two phases according to the degree of cervical dilation: the latent phase and the active phase. The latent phase is from regular uterine contractions to 6 cm cervical dilation, and the active phase refers to the period from 6-10 cm cervical dilation. It should be noted here that the speed at which the cervix dilates is different between primiparas and multiparas. For primiparas, the cervix shortens and flattens first, and then the cervix dilates; while for multiparas, the cervix shortens, flattens, and dilates at the same time.

Therefore, the progress of multiparas is obviously faster than that of primiparas, which is also the main reason why the first stage of labor progresses differently between primiparas and multiparas. During the latent period, the cervix opens slowly, but during the active period, it opens much faster. The incubation period for primiparas is about 8 hours, and that for multiparas is faster than that for primiparas, but there are large differences between individuals, and the length of the incubation period varies from person to person, ranging from tens of minutes to several hours. The active period of a primipara lasts about 4 hours. After a multipara enters the active period, she should prepare for delivery, because the cervix of a multipara will usually fully dilate soon after entering the active period.

1. After the fetus enters the pelvis, the birth canal is prepared and the mother's vagina will naturally relax and open.

2. The doctor can observe the degree of dilation of the cervix.

The doctor can also use digital examination to explore the condition of the cervix. Usually an anal or vaginal examination is done. The doctor, wearing sterile gloves, inserts a finger into the vagina, places the finger on the opening of the uterus, and uses the finger to measure the opening of the uterus.