Reference table of standard values ​​of uterine height and abdominal circumference of pregnant women

After a woman becomes pregnant, she needs to pay attention to her own health and the growth and development of the baby in her belly. So what methods can be used to care about the growth and development of the baby? Of course, it is by accurately measuring the uterine height and fetal abdominal circumference, and judging whether these data meet the requirements, and then calculating whether the baby is growing healthily. The uterine height and fetal abdominal circumference indicators in the late pregnancy are as follows: The expansion of the uterus during pregnancy is cyclical, which is manifested as an increase in basic strength and an increase in fetal abdominal circumference. The standard values ​​of the mother's uterine height and fetal abdominal circumference during pregnancy can infer the pregnancy period and the development of the baby.

Generally, it is measured once every 4 weeks starting from the 20th week of pregnancy, once every 2 weeks from the 28th to 35th week of pregnancy, and once a week after the 36th week of pregnancy.

The method to accurately measure uterine height: let the pregnant woman lie flat on the bed after urinating, and use a soft ruler to accurately measure the distance from the center of the upper edge of the ischial tuberosity to the fundus of the uterus. Generally, it is measured once every 4 weeks starting from the 20th week of pregnancy, once every 2 weeks from 28 to 35 weeks of pregnancy, and once a week after 36 weeks of pregnancy.

Let's take a look at the standards of fetal abdominal circumference at each stage of uterine height: Standardized reference table for pregnant women's uterus: Calculation method: (lunar week 3) 7=-3 < uterine height < 3 are all normal. Standard reference table for fetal abdominal circumference of pregnant women: Lower limit of fetal abdominal circumference in 5 months of pregnancy: 76; Fetal abdominal circumference limit: 89; Standard fetal abdominal circumference: 82; Lower limit of fetal abdominal circumference in 6 months of pregnancy: 80; Fetal abdominal circumference limit: 91; Standard fetal abdominal circumference: 85; Lower limit of fetal abdominal circumference in 7 months of pregnancy: 82; Fetal abdominal circumference limit: 94; Standard fetal abdominal circumference: 87; Lower limit of fetal abdominal circumference in 8 months of pregnancy: 84; Fetal abdominal circumference limit: 95; Standard fetal abdominal circumference: 89; Lower limit of fetal abdominal circumference in 9 months of pregnancy: 86; Fetal abdominal circumference limit: 98; Standard fetal abdominal circumference: 92; Lower limit of fetal abdominal circumference in 10 months of pregnancy: 89; Fetal abdominal circumference limit: 100; Standard fetal abdominal circumference: 94.

The efficacy of accurately measuring uterine height and fetal abdominal circumference in pregnant women

The uterine height refers to the distance from the center of the upper edge of the ischial tuberosity to the highest point of the bottom of the uterus. It reflects the length of the longitudinal diameter of the uterus, measured in centimeters. The uterine height and fetal abdominal circumference can indirectly reflect the size of the uterus. As pregnancy progresses, the uterus expands to match the growth of the fetus. Accurate measurements of uterine height and fetal abdominal circumference can be used to determine the number of weeks of pregnancy, indirectly understand the growth of the fetus, and estimate the baby's weight. Accurately measuring the uterine height and fetal abdominal circumference during each pregnancy check-up is helpful for dynamically observing the fetal development and promptly dealing with pregnancy abnormalities such as intrauterine language delay, macrosomia or polyhydramnios, so that they can be corrected through timely treatment. When a woman is 31 weeks pregnant, she is already in the late stage of pregnancy. In the late stages of pregnancy, the fetus in a woman's belly is already a fully-fledged baby. At this time, women's uterine height and fetal abdominal circumference have certain accurate standard values. If you want to know whether your fetal abdominal circumference and uterine height are normal, you'd better refer to the content in the article carefully.

31 weeks of pregnancy, uterine height, fetal abdominal circumference, everything is normal

The measurement of the fetal abdominal circumference begins from the 16th week of pregnancy. The method is: the expectant mother takes a standing position, takes off her clothes, completely exposes her abdomen, takes the navel as the standard, and takes a tape measure around the abdomen horizontally. The measured value is the fetal abdominal circumference. The fetal abdominal circumference increases by an average of 0.8 cm per week. The growth rate is faster during the 20th to 24th week of pregnancy, increasing by 1.6 cm per week; during the 24th to 36th week of pregnancy, it increases by 0.8 cm per week; after the 36th week of pregnancy, the growth rate of the fetal abdominal circumference slows down, increasing by 0.3 cm per week. Taking the abdominal circumference of the fetus at 16 weeks of pregnancy as the number, the average increase in abdominal circumference of a full-term fetus is 21 cm. When the fetus's abdominal circumference does not increase according to the standard value, expectant mothers will feel confused. In fact, the growth of the fetal abdominal circumference cannot be completely consistent. This is due to:

When preparing for pregnancy, each person's weight is different, and the fetal abdominal circumference is also different.

The increase in the fetal abdominal circumference after pregnancy is due to the growth of the fetus and uterus, as well as many other factors affecting the pregnant woman herself: some pregnant women gain weight rapidly after pregnancy, their abdominal fat thickens quickly, and their hip circumference and fetal abdominal circumference increase faster than others; some pregnant women have severe pregnancy reactions and eat less, so the fetal abdominal circumference does not increase significantly in the early stage. It is not until the reaction subsides and the fetal abdominal circumference begins to increase continuously after weight gain; some pregnant women have significant hypokalemia, which can also cause a significant increase in the fetal abdominal circumference.

Therefore, the growth and development of the uterus and fetus cannot be judged solely by the increase in the fetal abdominal circumference. It should be combined with other tests for comprehensive analysis. Expectant mothers do not need to worry because the fetal abdominal circumference is a few standard values ​​different.

At 12 weeks of pregnancy, the height of the fundus of the uterus is about 2 to 3 horizontal fingers above the ischial tuberosity, and by the fifth month of pregnancy it will be 1 horizontal finger below the navel. The expectant mother can feel the location of the fundus of the uterus by herself, and the uterine height is about 18 cm at this time.

From 16 to 36 weeks of pregnancy, the uterine height increases by 0.8 to 1.0 cm per week, with an average of 0.9 cm. On the 24th Sunday, it is 1 horizontal finger above the belly button, and on the 28th Sunday, it is 3 horizontal fingers above the belly button.

At 31 weeks of pregnancy, the standard value of uterine height should be 25~31.5 cm, and the standard value of fetal abdominal circumference should be 84~95 cm.

A low uterine height value often indicates that the baby's intrauterine language development is delayed or deformed; a high uterine height indicates multiple births, deformed fetuses, macrosomia, breech presentation, high floating head position of the fetus, polyhydramnios, placenta previa, etc.