Preventing premature birth is very important at this time. Natural delivery between 28 weeks and less than 37 weeks of gestation is called premature birth. During this period, newborns born with a weight of more than 1 dry grams and less than 2.5 kilograms and whose organs are immature are called premature babies. The reasons for premature birth include: acute and chronic diseases, pregnancy complications such as premature rupture of membranes, placenta previa, placental abruption, etc., uterine deformity, severe abdominal trauma or intra-abdominal surgery, or pregnant mother smoking. , alcoholism, and drug abuse. In addition, fetal and placental reasons can also cause premature birth. Pregnant mothers with a history of miscarriage, premature birth, or bleeding during this pregnancy are prone to premature birth. If symptoms of premature labor occur, seek medical attention immediately. If the gestational age is less than 35 weeks, those who have uterine contractions but have not ruptured membranes should rest in bed. Lying on the left side can reduce uterine contractions. For pregnant mothers who are more than 37 weeks pregnant, labor will occur naturally regardless of whether the membranes have ruptured or not. Pregnant mothers should pay attention to getting enough rest at ordinary times, strengthen pregnancy check-ups, and actively prevent the occurrence of premature birth. Methods to relieve back pain in pregnant mothers: The ligaments in the lower back become softer and stretchable during pregnancy to prepare for the physical changes during pregnancy and childbirth. Back pain can be felt when the joint ligaments are stretched when bending over. As the fetus grows, the curvature of the spine increases, making lower back pain more likely to occur when bending over. You can avoid or reduce low back pain by bending your knees and keeping your back straight when picking or lifting items from the floor. When you have to lift a heavier object, try to lift the object as close to your body as possible. When turning, don\’t just twist your waist, but move your steps. Wear flat heels so that your entire body weight is evenly supported on your feet. Don\’t work in a posture that flatters your waist. When carrying something, keep the weight of both hands roughly the same. When sitting, your back should be straight and supported. What to do if a pregnant mother has cramps in the middle of the night. After the second trimester, the weight of the pregnant mother gradually increases, the burden on the legs increases, and the leg muscles are often in a state of fatigue. After pregnancy, the body\’s need for calcium greatly increases, and insufficient calcium supplementation is also a cause of cramps. On average, non-pregnant women need 600 mg of calcium per day. After pregnancy, especially in the third trimester, the daily calcium requirement increases to 1,200 mg. At this time, if you do not pay special attention to diet and other aspects, it is easy to cause calcium deficiency. Some cramping problems also come from sleeping posture. In addition, it may also be related to local blood circulation and blood pH balance. If you have cramps during sleep, you must adjust your sleeping position, sleep on your left side as much as possible, and pay attention to keeping your lower limbs warm. In case of cramps, you can also ask family members to help with heat compresses and massage to relieve the pain of cramps. Taking calcium supplements before bed can reduce nighttime leg cramps.