Amniotic fluid depth

What is the depth of amniotic fluid?

Amniotic fluid depth refers to the vertical depth of the amniotic fluid pool, which is an important index to judge the amount of amniotic fluid during pregnancy. Normal amniotic fluid depth is 3-7 cm, if more than 8 cm suggests excessive amniotic fluid, amniotic fluid, pregnant women are prone to complication of pregnancy hypertension, premature rupture of membranes, fetal abnormalities, premature birth rate increased; if less than 2 cm suggests oligohydramnios, oligohydramnios in fetal labor will cause meconium deposition, or even premature birth or asphyxia, so It is important to know the depth of amniotic fluid in fetal development.

Amniotic fluid depth standard

Amniotic fluid was normal and the amniotic fluid volume was 3-7cm. Before 28 weeks (7 months) of pregnancy, because of more amniotic fluid, the fetus is smaller, the fetus in the uterine cavity of a large range of activity, fetal position is easy to change. After 32 weeks of pregnancy (8 months), the fetus grew faster and the amniotic fluid decreased.

The following is a list of each period of normal amniotic fluid depth standards, pregnant mothers can refer to the data.

Standard deviation of gestational weeks mean

Effect of amniotic fluid depth on pregnancy

The amniotic fluid in the pregnant woman’s uterus can protect the fetus from external injury, keep the suitable temperature in the uterus and allow the fetus to move freely. It is very important for the pregnant woman. The depth of amniotic fluid is an important indicator of how much amniotic fluid, so pregnant mothers must pay attention to the depth of amniotic fluid inspection.

If the depth of amniotic fluid (> 8 cm), that means excessive amniotic fluid, excessive amniotic fluid on pregnant women’s impact is mainly placental abruption, uterine atony, postpartum hemorrhage and so on. Owing to excessive amniotic fluid, fetal activity in the uterine cavity is greater, prone to malposition; uterine overexpansion, high pressure, easy to cause premature delivery. If amniotic fluid outflow after rupture, resulting in reduced intrauterine pressure, can cause early placental detachment, and pregnant women with a larger uterus, excessive traction easily lead to uterine atony, but also lead to the risk of postpartum hemorrhage, these are pregnant women and fetuses are greatly affected.

If the depth of amniotic fluid is less than 2 cm, that means oligohydramnios, oligohydramnios on the fetal impact is mainly increased perinatal mortality, will cause fetal hypoplasia, malformation and hypoxia. The impact on pregnant women is increased the risk of cesarean section.

The difference between amniotic fluid depth and amniotic fluid index

The difference between amniotic fluid depth and amniotic fluid index amniotic fluid depth and amniotic fluid index are two different concepts, many pregnant mothers are confused, we look at the difference between amniotic fluid depth and amniotic fluid index.

Amniotic fluid depth: It is the vertical depth of amniotic fluid pool examined by B ultrasound. Generally speaking, the amniotic fluid depth (AFV) 3-7 cm is normal amniotic fluid volume, < 2 cm indicates oligohydramnios, > 8 cm indicates excessive amniotic fluid. It is a medical term and an important indicator of the number of amniotic fluid.

Amniotic fluid index: the uterus is divided into upper left, upper right, lower left and lower right quadrant, four quadrants of the maximum amniotic fluid dark area vertical depth of the sum of amniotic fluid index. The general amniotic fluid index (9-24cm) is normal amniotic fluid volume. If the amniotic fluid index (> 25 cm) was diagnosed as excessive amniotic fluid, the amniotic fluid index (AFI) was 25-35 cm for mild excessive amniotic fluid, 36-45 cm for moderate excessive amniotic fluid, and > 45 cm for severe excessive amniotic fluid. When the amniotic fluid index is less than 5cm, oligohydramnios is less than 8cm.