What is the normal amniotic fluid index in mm?

How much amniotic fluid is considered normal? Amniotic fluid refers to the fluid in the amniotic cavity of the uterus during pregnancy. The main function of this fluid is to maintain a constant temperature of the fetus in the abdomen and relieve external impact. It can also reduce the discomfort of pregnant mothers during pregnancy. Under normal circumstances, the amount of amniotic fluid will increase with the increase of gestational age. In the second and third trimester of pregnancy or at term, the amniotic fluid volume is generally considered normal if it remains between 800-1200ml. If the amniotic fluid volume exceeds 2000ml, it is called polyhydramnios. If the amniotic fluid volume exceeds 2000ml, it is called polyhydramnios. When the amount of amniotic fluid is less than 300ml, it is called oligohydramnios. What is the Life Guide for Pregnant Women and Expectant Mothers PDF? However, since the amniotic fluid is in the mother\’s belly, it is impossible to measure its amount with a measuring cup, so the doctor will use B-ultrasound to understand the amount of amniotic fluid. Generally, there are not too many requirements and tests on the amniotic fluid in the first trimester. In the second and third trimesters, the amniotic fluid index or amniotic fluid depth will usually be displayed on the B-ultrasound sheet. Depth of amniotic fluid (dvp): refers to the vertical depth of the largest amniotic pool indicated by B-ultrasound examination. The normal reference value is 3 to 8cm. Less than 3cm indicates oligohydramnios, and greater than 8cm indicates polyhydramnios. Amniotic Fluid Index (AFI): Divide the uterus into four quadrants at right angles with the horizontal line of the umbilical cord and the abdominal white line as markers, and measure the vertical diameter of the largest amniotic pool in each quadrant. The sum of the four is the amniotic fluid index. The normal value range is 5 to 18cm. If it is less than 5cm, it is oligohydramnios. If it is less than 8, it is oligohydramnios. If it is between 18 and 24cm, it is suspected polyhydramnios or polyhydramnios. If it is greater than 24cm, it is diagnosed as polyhydramnios.