Is color Doppler ultrasound accurate in measuring fetal weight?

Is color Doppler ultrasound accurate in measuring fetal weight?

For the fetus in the body, they have a standard weight at different stages. In the early stages of pregnancy, they develop slowly, so the pregnant mother's belly does not look so obvious. In the late stages of pregnancy, the pregnant mother's belly will become particularly large, and the fetus will gradually develop completely. Generally, color Doppler ultrasound is used to measure the weight of the fetus. So is color Doppler ultrasound accurate in measuring the weight of the fetus?

Is the fetal weight on the ultrasound report accurate?

The weight of the fetus is an important basis for assessing the growth of the fetus. In the late pregnancy, the doctor will arrange for the expectant mother to undergo an ultrasound examination to assess the weight of the fetus, whether it is suitable for natural delivery, etc.

During the first three months of pregnancy, the fetal length (cm) is calculated mainly by measuring the distance from the fetal head to the hips. As the fetus develops, starting from the 15th week of pregnancy, the head circumference (HC) or the diameter between the two parietal bones (BPD), abdominal circumference (AC) and femur length (FL) are measured to determine the size of the fetus, and then the fetal weight (g) is estimated.

Since there is a large error in measuring the length of the fetus, for example, the curled posture of the fetus and the size of the skeleton may cause misjudgment of the results. Therefore, in medicine, weight rather than height is used as the basis for assessing fetal growth.

Measurement formula collection:

Formula 1: Fetal weight (g) = - 4973.72 + 260.69 × HC (head circumference);

Formula 2: Fetal weight (g) = - 2686.60 + 171.48 × AC (abdominal circumference);

Formula 3: Fetal weight (g) = - 2232.56 + 747.42 × FL (femur length);

Formula 4: Fetal weight (g) = - 2513.51 + 1049.90 × FTH (fetal leg subcutaneous fat thickness);

Formula 5: Fetal weight (g) = - 5168.32 + 100.97×HC (head circumference) + 110.86×AC (abdominal circumference) + 143.09×FL (femur length) + 331.43×FTH (fetal leg subcutaneous fat thickness);

Formula 6: Fetal weight (g) = 900 × BPD (biparietal diameter) - 5200;

Formula 7: Fetal weight (g) = 2900 + 0.3 × uterine fundus height × waist circumference.

<<:  How many weeks is it best to do 3D color ultrasound

>>:  Can I do color Doppler ultrasound in early pregnancy?

Recommend

Non-menstrual bleeding with back pain

Menstruation every month is really a torture for ...

How to delay menopause by taking care of your health

1. Correct understanding and stable emotions For ...

Can girls remove beards?

When girls grow beards, many people will use twee...

What is the reason for prolonged and excessive menstrual periods?

Women get together with their "good friends&...

The reason why girls have big knee bones

What is the reason for girls' big kneecaps? I...

Pregnant woman vomits suddenly

During pregnancy, the reaction of pregnancy is so...

Causes of swelling in women

Edema in the human body must be taken seriously, ...

What causes pain on the right side of the uterus?

The uterus is a physiological organ unique to wom...

What are the causes of miscarriage in the fifth month of pregnancy?

Every pregnant woman wants the fetus to develop n...

Does a hydatidiform mole have a fetal heartbeat or fetal bud?

In fact, hydatidiform mole has no fetal heartbeat...

Why are sausages also called hot dogs? Can hot dogs be baked in the oven?

It is one of the five major fast foods in the Wes...

Can I eat fermented glutinous rice during menstruation?

Can you eat Laozao during menstruation? We all kn...

Back pain around five months of pregnancy

After five months of pregnancy, lower back pain i...

8 major benefits of collagen, worth seeing!

If the skin lacks collagen, it will easily cause ...