34 weeks fetal abdominal circumference standard

When pregnant women take X-rays, they will not only measure their own abdominal circumference and uterine height, but also the fetal abdomen and neck to determine whether the fetus is growing healthily. If the fetal abdominal diameter does not grow within one or two months, it is very likely that the health of the fetus has been damaged. So what is the standard value of fetal abdominal circumference at 34 weeks of pregnancy? The following is a detailed introduction

When the baby is full-term, the BPD should reach 9.3 cm or more. What does the biparietal diameter standard for a 34-week fetus specifically refer to? According to general rules, after 5 months of pregnancy, the BPD is basically consistent with the month of pregnancy, that is, at 28 weeks of pregnancy (7 months) the BPD is about 7.0 cm, at 32 weeks of pregnancy (8 months) it is about 8.0 cm, and so on. After 8 months of pregnancy, the average weekly growth is about 0.2 cm, which is normal. The standard biparietal diameter of the fetus at 34 weeks is 8.61±0.63. When the due date cannot be determined by CRL in the early stage, BPD is often used to predict it; after the middle stage, this data is often also needed to be measured when estimating the fetal weight.

The biparietal diameter of the fetus is usually measured by ultrasound. As the fetus grows older, the skull continues to grow. When measuring the biparietal diameter, it should be measured from the inner edge of the skull on one side to the outer edge of the skull on the opposite side. This value is more accurate. If the examination is conducted in different hospitals, by different doctors, and on different machines, the value will be biased.

What to do if the biparietal diameter of the fetus is too large at 34 weeks

The larger biparietal diameter of the fetus is a sign of larger fetal development, which is directly related to the good nutrition and low activity level of the expectant mother. It shows that the adequate nutrition of the expectant mother has caused the larger fetus to develop, which is a common symptom nowadays. Therefore, if the fetus's biparietal diameter is relatively large, the expectant mother does not need to worry. As long as there is no abnormality in the fetus's head, she can rest assured.

However, if the biparietal diameter of the 34-week fetus is too large, the first thing to consider is hydrocephalus. It is recommended to pay attention to checking the fetal brain during B-ultrasound to rule out the possibility of abnormal development of the baby.

When the fetal biparietal diameter is small, it may be due to inaccurate gestational age or errors in B-ultrasound measurement. Because there will be a certain error in the biparietal diameter examined by B-ultrasound, generally speaking, a difference of 1 week from the actual gestational age can be considered within the normal range. If the biparietal diameter is small, it may be due to late conception and small size of the fetus. If there are no obvious developmental abnormalities, there is no need to worry too much. It is recommended to follow the doctor's advice for treatment according to the specific situation of the prenatal examination, pay attention to regular life and diet, pay attention to strengthening nutrition, eat more high-protein foods, and have regular physical examinations.