38 weeks of pregnancy fetal abdominal circumference standard

The items for check-ups during different pregnancy periods will also be different, especially in the late pregnancy. In order to have a normal delivery, pregnant women should exercise more and control their diet and not let their weight exceed the standard. In particular, the size of the fetus should be checked to avoid the phenomenon of an oversized baby. If the baby is seriously oversized, it will be difficult to have a normal delivery. You should understand the relevant content of the fetal abdominal circumference standard at 38 weeks of pregnancy. If it exceeds the standard too much, you should consider a caesarean section.

1. Abdominal circumference standard of fetus at 38 weeks of pregnancy

In terms of gestational months, at the end of the first month, the uterus is slightly larger than before pregnancy, like a duck egg; at the end of the second month, it is as big as a fist; at the end of the third month, the fundus of the uterus is about 2 to 3 horizontal fingers above the upper edge of the pubic symphysis; at the end of the fourth month, the fundus of the uterus is between the navel and the upper edge of the pubic symphysis; at the end of the fifth month, it is 2 horizontal fingers below the navel; at the end of the sixth month, it is level with the navel; at the end of the seventh month, it is 3 horizontal fingers above the navel; at the end of the eighth month, it is between the navel and the xiphoid process; at the end of the ninth month, the fundus of the uterus is the highest, 2 horizontal fingers below the xiphoid process; at the tenth month, the fetal head descends into the pelvis, and the fundus of the uterus descends back to the level at the end of the eighth month.

2. Standards for uterine height and abdominal circumference during pregnancy

20 weeks of pregnancy: 16-20.5CM;

21 weeks of pregnancy: 17-21.5CM;

22 weeks of pregnancy: 18-22.5CM;

23 weeks of pregnancy: 19-23.5CM;

24 weeks of pregnancy: 20-24.5CM;

25 weeks of pregnancy: 21-25.5CM;

26 weeks of pregnancy: 21.5-26.5CM;

27 weeks of pregnancy: 22.5-27.5CM;

28 weeks of pregnancy: 23-28.5CM;

29 weeks of pregnancy: 23.5-29.5CM;

30 weeks of pregnancy: 24-30.5CM;

31 weeks of pregnancy: 25-31.5CM;

32 weeks of pregnancy: 26-32.5CM;

33 weeks of pregnancy: 27-33.5CM;

34 weeks of pregnancy: 27.5-34.5CM;

35 weeks of pregnancy: 28.5-35.5CM;

36 weeks of pregnancy: 29-36.5CM;

37 weeks of pregnancy: 29.5-37.5CM;

38 weeks of pregnancy: 30.5-38.5CM;

39 weeks of pregnancy: 31-38.5CM;

40 weeks of pregnancy: 32-38.5CM.

3. What tests should be done at 38 weeks of pregnancy

1. Routine prenatal check-up items

I am 38 weeks pregnant and will have the 11th prenatal check-up this week. Routine items of the prenatal check-up include blood pressure, weight, uterine fundus height, abdominal circumference, fetal heart rate, fetal position, blood routine, urine routine, and fetal heart rate monitoring. These basic items are very important in every prenatal check-up in the late pregnancy, and can allow doctors to understand the basic conditions of the expectant mother and fetus.

2. Key prenatal examination items: pelvic internal measurement

This week's prenatal check-up includes pelvic measurement. Whether the fetus can pass through the pelvis and be delivered smoothly is not only related to the size of the fetus but also closely related to the size and shape of the pelvis. A deformed or narrow pelvis can easily lead to dystocia; asymmetric head and pelvis can also lead to dystocia. Pelvic measurement and analysis of measurement results can tell whether a pregnant woman can give birth naturally and whether it will lead to dystocia.