40 weeks pregnant, only back pain, no uterine contractions

After ten months of pregnancy, when it comes to the due date, women are anxious to deliver the baby. Because I was very tired in the later stages of pregnancy, my body shape was seriously out of shape, which made my body dull and inconvenient. Therefore, they are anxious for the baby to be born, but often when the due date comes, some fetuses do not grow. For example: What are the reasons for only lower back pain and no uterine contraction at 40 weeks of pregnancy?

According to the frequency of uterine contractions, they can be divided into: normal (observed for at least 30 minutes, average ≤ 5 times per 10 minutes) and strong (observed for at least 30 minutes, average > 5 times per 10 minutes). The uterine contraction curve expresses the intrauterine pressure, which increases during contractions and then maintains around 2b250mHg. Observation of the uterine contraction curve plays a very important role in distinguishing deceleration (referring to the slowing down of fetal heart rate when uterine contraction occurs). Fetal heart rate decelerations are divided into multiple (decelerations within 20 minutes with at least half of the uterine contractions) and interrupted (decelerations within 20 minutes with less than half of the uterine contractions). Based on the relationship between fetal heart rate and uterine contraction, it can be divided into three categories: early deceleration, genetic variation deceleration, and terminal deceleration.

Most pregnant women feel uterine contractions in the later stages of pregnancy, but why is there no uterine contraction in the fetal heart rate monitoring at 40 weeks? If a pregnant woman still does not have uterine contractions at 40 weeks of pregnancy, she does not need to worry too much. It is normal for uterine contractions to occur within 2 weeks of delivery. In addition, some pregnant women also have frequent uterine contractions in the late pregnancy. In fact, this kind of ineffective uterine contraction is common in the late pregnancy. When this happens, you should pay attention to rest, do not irritate the abdomen, do not take any medicines, and go to the hospital immediately if you have back pain and abdominal pain. If this happens frequently, you need to stay in bed and rest.

The normal range of the fetal heart rate baseline: in my country, it is required to be 120-160 beats/minute. A fetal heart rate of <120 beats/min or >160 beats/min for more than 10 minutes is called fetal bradycardia or fetal tachycardia. Fetal bradycardia can be seen in cases of overdue pregnancy, transverse occipital position, congenital heart disease or cardiac transmission defects in pregnant women. It can also be seen in cases of hypothermia, hypoglycemia, hypothyroidism, taking beta-blockers, etc. It usually does not occur suddenly and generally does not require emergency intervention. Fetal tachycardia is often related to fever, infection in pregnant women, anemia or lack of oxygen in the fetus, hyperthyroidism, rapid arrhythmia in the fetus, or is caused by the use of central nervous system inhibitors and sympathetic nerve blockers.