How thick is the caesarean scar for a normal birth?

In the past two years, the second-child policy has been completely relaxed, which has excited many mothers. They all want to give their babies more companions and let them experience how happy it is to have brothers and sisters. They also want them to have the company of their loved ones when they grow old. But the reality is that many mothers have their first child by caesarean section, so they all have uterine scars. The thickness of the scar can also determine the method of delivery. So how thick is the caesarean scar for a natural birth?

A scarred uterus, also known as a scarred uterus, refers to a uterus that leaves scars after an injury. Uterine scarring does not necessarily occur in women with a scarring constitution, but most commonly occurs in mothers who have undergone cesarean section. Because a cesarean section requires an incision in the lower part of the uterus, a scar will form on the anterior wall of the uterus.

In general, grade 1 scar (well-healed): the thickness of the lower segment of the anterior wall of the uterus is >= 3mm, and the echoes of each layer are continuous and uniform. Grade 11 scar (poorly healed): the thickness of the lower segment of the anterior wall of the uterus is < 3mm, the echoes of each layer lose continuity, and there is no bulging of the amniotic membrane when pressure is applied.

For pregnant women with uterine scar who had their first cesarean section, vaginal delivery can only be chosen if the indications for vaginal delivery are met. Generally, mothers who have undergone low-position uterine transverse cesarean section and have no contraindications to vaginal delivery can undergo vaginal trial delivery if the following conditions are met:

1. Had one low transverse cesarean section (if a conventional or T-shaped incision or extensive transuterine fundus surgery has been performed, vaginal delivery is not suitable);

2. The transverse diameter of the pelvis should be large enough (generally required to be greater than 15 cm);

3. No history of uterine scarring or uterine rupture (it is not suitable if there have been two uterine scarrings and no vaginal delivery);

4. During the entire natural delivery period, doctors can be present at any time to monitor delivery and perform emergency cesarean sections;

5. Anesthesia can be given immediately and emergency cesarean section personnel can be on site at any time.

6. Pay attention to balanced nutrition during pregnancy, control your own and fetal weight, and reduce dystocia caused by an oversized fetus during delivery;

7. No new factors for cesarean section appear before delivery.

Only when the above conditions are met and the doctor has examined the mother and confirmed that her condition permits, can a normal birth be performed. If during the trial birth, there are abnormal delivery conditions such as prolonged labor, maternal bleeding, etc., the doctor will ask the mother to change the delivery method and perform a caesarean section to ensure the safety of mother and child. At this time, it is best for the mother to cooperate with the doctor's advice.