Causes of back pain in late pregnancy

In the early stages of pregnancy, many symptoms are not obvious, so the physical condition of pregnant women is relatively good in the early stages of pregnancy. However, various symptoms will appear in the later stages of pregnancy. Low back pain is a more prominent symptom in the later stages of pregnancy. So why does this symptom occur? Let’s find out together.

After a woman becomes pregnant, as the pregnancy progresses, the uterus slowly enlarges, the support force of the waist continues to increase, and the round ligament of the uterus relaxes due to long-term traction, causing the sacrospinous ligament to relax, compressing the pelvic nerves and blood vessels, causing many expectant mothers to feel back pain. This type of low back pain will generally disappear gradually as the waist muscle strength recovers after delivery. The causes of low back pain in early, mid and late pregnancy are different. Low back pain in the early pregnancy stage will not be very serious, the pain is relatively mild, mostly low back pain. Low back pain during this period is often caused by the retroverted uterus, which compresses the rectum and ligaments, so pregnant mothers don't need to worry.

Low back pain during the middle and late stages of pregnancy is mostly caused by the rapid pain of the fetus, which causes the uterus to gradually enlarge and the abdomen to move forward. In order to maintain body balance, the upper body compensates by leaning back, causing excessive lordosis of the spine and continuous tension in the back extensor muscles, resulting in excessive fatigue of the waist and back, which can easily lead to low back pain. Generally speaking, the symptoms can be relieved after rest. In addition, during pregnancy, the fetus needs sufficient nutrients such as calcium and phosphorus for development. If the dietary intake of nutrients is insufficient, it will cause osteoporosis and decalcification in pregnant women, and may also cause low back pain. Excessive postpartum bleeding, premature labor, excessive fatigue, and cold can also cause low back pain.

Due to pregnancy, hormone secretion in the human body changes. In order for the baby to pass smoothly through the birth canal during delivery after pregnancy, the human body secretes a hormone that relaxes the ligaments connecting the pelvis. This hormone also relaxes the muscles, increasing the curvature of the spine, making back pain more likely.

In addition, the impact on the uterus and fetus can also cause low back pain. Back pain during pregnancy often occurs in the middle and late stages, especially after twenty-five or twenty-six weeks of pregnancy. At this time, the uterus gradually enlarges and the abdomen bulges forward. When standing, the center of gravity moves forward. In order to maintain body balance, the pregnant woman's body will tilt backward, and the center of gravity shifts backward to above the buttocks. The weight of the pregnant woman's upper body is borne by the lumbar spine and waist muscles.

Let me tell you that during pregnancy, it is relatively easy in the early stages, but more tiring in the middle and late stages. This is because in the later stages of pregnancy, the belly gets bigger and bigger, and the uterus also gradually grows. In order to maintain the body's balance, the waist will be under too much force, so pregnant women will experience back pain in the later stages. This is normal, so please don't worry too much.