What is uterine height? Many first-time mothers may not be familiar with it. In fact, uterine height is a necessary test item for every pregnancy examination. It can reflect whether the fetus is developing healthily through the data of uterine height and abdominal circumference. Generally, there are standards for uterine height and abdominal circumference testing data, which are convenient for comparison. What is the standard for uterine height and abdominal circumference for 29 week pregnant women? Today, the editor will explain it to you.
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Uterine height refers to the length from the pubic symphysis of the lower abdomen to the bottom of the uterus, and is one of the data used to determine the size of the uterus. Simply put, it is necessary to measure the size of the uterus in pregnant women. Uterine height usually needs to be measured together with abdominal circumference, and it is usually required to be measured during every prenatal examination starting from 20 weeks of pregnancy.
Standard for high abdominal circumference in pregnant women at 29 weeks
The standard height of the uterus at 29 weeks of pregnancy should be 23.5-29.5 cm, which is 2-3 fingers above the navel. Under normal circumstances, the average growth rate is 1cm per week starting from week 21, and 0.65cm per week starting from week 34. If the height of the uterine fundus does not increase for several consecutive weeks, and even the transverse diameter of the uterus does not widen, it indicates fetal growth retardation. In this case, it is necessary to consult a doctor to further investigate the cause; If the uterine fundus rises too quickly, it may be caused by rapid fetal growth or polyhydramnios.
The role of measuring uterine height during pregnancy
1. Evaluate fetal development. Measure the height of the uterine fundus and draw the measurement results on a pregnancy chart to observe whether the fetal development matches the gestational age. If it is found to be inconsistent with the gestational age, whether it is too large or too small, the cause should be investigated, such as performing special examinations such as B-ultrasound to determine whether there are twins, deformities, stillbirths, polyhydramnios, oligohydramnios, and other problems.
2. Estimated due date. Another function of measuring uterine height is to predict the expected delivery date. In general, the curve of fetal uterine height changes first up and then down. At the 4th month of pregnancy, the height of the uterine fundus is 10cm above the pubic symphysis. Until the 9th month of pregnancy, the height of the uterine fundus continues to rise, reaching 28-30cm above the pubic symphysis. But by the 10th month of pregnancy, the height of the uterine fundus will return to the height at the 8th month. That is to say, as the birth time of the fetus approaches, the uterus will begin to descend, and 1-2 weeks before labor, most of the fetus's head has already descended into the pelvis. So, uterine height can also roughly determine whether the fetus has entered the womb and estimate the approximate due date.
The measurement data of uterine height and abdominal circumference may be affected by the different positions of the fetus in the uterus. When the uterine height value is found to be different from the normal value, pregnant women do not need to worry too much. Doctors can use ultrasound examination to determine whether the fetus has abnormalities. If it is indeed found that the fetus has developmental abnormalities, as long as it is corrected through timely treatment, there will be no problem.
