How much amniotic fluid is normal for eight and a half months of pregnancy

At eight months of pregnancy, the amniotic fluid should be around 3 to 7 centimeters. Generally speaking, if it is more than seven centimeters, then there is more amniotic fluid. But if it is less than three centimeters, it means that there is less amniotic fluid. Too much or too little amniotic fluid is not good for the pregnant woman and the fetus. Therefore, in the late stages of pregnancy, you must do prenatal checkups, understand the specific situation, and be prepared for delivery at any time.

How much amniotic fluid is normal for eight and a half months of pregnancy

Generally speaking, the depth of amniotic fluid is normal between 3-7 cm. More than 7 cm indicates increased amniotic fluid, and less than 3 cm indicates decreased amniotic fluid. The amniotic fluid index is 8-20cm, which is normal amniotic fluid volume. When the amniotic fluid index is less than 5cm, it is too little amniotic fluid, and when it exceeds 20cm, it is too much amniotic fluid.

What is the normal value of amniotic fluid in pregnant women?

As the gestational age increases, the amniotic fluid in the mother's uterus will also increase until the late pregnancy, when the amniotic fluid reaches a certain value and then decreases. To avoid having too much or too little amniotic fluid, it is best to understand the normal value of amniotic fluid. What is the normal value of amniotic fluid in pregnant women?

First of all, in the first three months of pregnancy, the amniotic fluid mainly comes from the plasma components of the embryo and there is not too much. In the later stage, when the fetal organs are mature, the amniotic fluid will be obtained from the fetal urine, organs, and umbilical cord, which will become the main source of amniotic fluid. If the fetus does not develop normally and the urine is less, there will be too little amniotic fluid and it will not reach the normal value. If the fetus produces too much urine and it accumulates in the uterus, it may also lead to polyhydramnios.

Secondly, the amniotic fluid must be controlled within a certain range, with 300-2000 ml being the normal range clinically. At 20 weeks, the amount of amniotic fluid is not much, about 500 ml. By the 28th week of pregnancy, the amount of amniotic fluid has increased significantly, averaging 700 ml. At 32-36 weeks, the amniotic fluid is at its highest, about 1000-1500 ml. Afterwards, the amount of amniotic fluid began to decrease and stabilized at around 1000 ml.

Finally, use the normal range of amniotic fluid volume as a reference to understand your own and the fetus's development, and avoid excessive or insufficient amniotic fluid that may affect the fetus. Generally, if the amount of amniotic fluid exceeds 2000 ml, it is considered as polyhydramnios. If the amount of amniotic fluid is less than 600 ml, it is called oligohydramnios. Whether the amniotic fluid is too little or too high, measures must be taken to care for it and avoid dangerous situations.

What causes excessive amniotic fluid?

If a pregnant woman has too much amniotic fluid, it indicates that there may be problems with both the mother and the fetus, and further examination is needed to determine the cause. What is the reason for excessive amniotic fluid in pregnant women? Let's take a look:

1. Fetal malformation: The probability of fetal malformation is 25%, such as anencephaly, spina bifida, neural tube defects, etc. Fetuses with anencephaly and hydrocephalus are unable to swallow the amniotic fluid, which causes it to accumulate in the uterus. In addition, fetuses with esophageal or small intestinal atresia may also experience polyhydramnios because they cannot swallow the amniotic fluid.

2. Multiple pregnancy: This is also one of the common causes of polyhydramnios, especially in monozygotic twin pregnancy, which is most likely to cause this symptom because the dominant fetus has more circulating blood and increased urine volume, and urine is one of the sources of amniotic fluid.

3. Pregnancy complicated by diabetes: If the pregnant mother suffers from diabetes, the blood sugar of the fetus will also increase. Once the blood sugar increases, it will cause polyuria and lead to excessive amniotic fluid.

4. Incompatibility of blood types between mother and fetus: Some pregnant mothers may also experience incompatibility of blood types between mother and fetus, which may lead to chorionic edema, affect amniotic fluid exchange, and cause excessive amniotic fluid.