What is the normal range in mm for amniotic fluid index in late pregnancy?

Dec 29, 2022 Source: Cainiu Health

Dr. Lv Aiming

Introduction

In late pregnancy, the normal range for the amniotic fluid index is generally 5 to 15 cm. Amniotic fluid abnormalities are indicated when the index is less than 5 cm or greater than 16 cm. An index below 8 indicates oligohydramnios, while an index above 16 indicates polyhydramnios. Oligohydramnios has many potential causes, most commonly fetal urinary tract malformations, placental insufficiency, or premature rupture of membranes.

In daily life, pregnant women all have amniotic fluid, which is the liquid within the amniotic cavity of the uterus,and throughout the entire pregnancy,it is an essential component indispensable for sustaining fetal life, and is therefore crucial for pregnant women. So, what is the normal range of amniotic fluid index in late pregnancymm?

What is the normal range of amniotic fluid index in late pregnancymm

In late pregnancy, the normal range of amniotic fluid index is generally 5 to 15 cm. Values below 5 cm or above 16 cm indicate abnormal amniotic fluid levels. Less than 8 cm indicates oligohydramnios (low amniotic fluid), while greater than 16 cm indicates polyhydramnios (excessive amniotic fluid). There are many causes of low amniotic fluid, most commonly fetal urinary tract malformations, placental dysfunction, or premature rupture of membranes.

Low amniotic fluid in late pregnancy poses certain risks to the fetus inside the uterus. Drinking plenty of warm water, nutritious soups, fruit juice, milk, soy milk, etc., can help ensure adequate hydration and slow down the rate of amniotic fluid reduction. Maternal factors such as dehydration, insufficient blood volume, and increased plasma osmotic pressure may also be primary causes. When amniotic fluid is too low, it's important to check whether there are other fetal abnormalities associated with polyhydramnios.

Expectant mothers should pay close attention to self-care, enhance their resistance and immunity, to ensure healthy development of both themselves and the fetus, and avoid various illnesses. We hope this answer has been helpful to you. Wishing you good health and a happy life!

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