Can a 2mm uterine scar at 37 weeks last until 39 weeks?
Jul 10, 2025
Source: Cainiu Health
Dr. Zhang Lu
Introduction
At 37 weeks, the uterine scar measures 2 mm. With no signs of scar thinning and a stable fetal condition, pregnancy may continue to 39 weeks. The scar thickness remains stable at 2 mm without significant thinning. Ultrasound evaluation indicates acceptable scar elasticity. Fetal growth and development are normal, with no signs of hypoxia or abnormalities in amniotic fluid. The pregnant woman has not experienced symptoms such as abdominal pain or vaginal bleeding. With physician assessment and approval, continuation of pregnancy until 39 weeks may be considered.
Generally, if the uterine scar thickness is 2mm at 37 weeks, with no signs of thinning and a stable fetal condition, the pregnancy may be able to continue until 39 weeks. However, if the scar continues to thin or abnormalities occur with the fetus, prolonging the pregnancy is not advisable. If concerns exist, it is recommended to seek medical advice in advance. Detailed analysis is as follows:
If the scar thickness remains stable at 2mm without significant thinning, ultrasound examination shows acceptable scar elasticity, fetal growth and development are normal, there are no signs of fetal hypoxia or abnormal amniotic fluid, and the pregnant woman experiences no discomfort such as abdominal pain during exercise or vaginal bleeding, continuation of the pregnancy to 39 weeks may be considered after physician evaluation, with enhanced monitoring required during this period.
If weekly examinations reveal continuous thinning of the scar, or tenderness at the scar site, frequent uterine contractions, fetal distress, oligohydramnios, or other abnormalities occur, continuing the pregnancy could increase the risk of uterine rupture, endangering both maternal and fetal safety. In such cases, prolonging the pregnancy to 39 weeks is not suitable, and timely termination of pregnancy is necessary.
Pregnant women with a scarred uterus should strictly follow medical advice for regular check-ups during late pregnancy, closely monitoring scar thickness and fetal status. Prompt medical attention should be sought upon any abnormal signs to avoid delays in treatment that could lead to complications.
