What is the reason for low amniotic fluid in pregnant women? It may be due to the following reasons

If a pregnant woman has low amniotic fluid, it will affect the development of the baby. Low amniotic fluid may be caused by fetal malformation, placental dysfunction, amniotic membrane lesions, gestational hypertension, gestational diabetes and other diseases. It is necessary to find out the cause and prescribe the right medicine.

What is the reason for low amniotic fluid in pregnant women

1. Fetal malformation: mainly fetal urinary system malformation, such as fetal renal agenesis. Renal tubular dysplasia, ureteral or urethral obstruction, bladder exstrophy can also lead to oligohydramnios.

2. Placental dysfunction: Overdue pregnancy, fetal growth restriction and placental degeneration can all lead to placental dysfunction. Chronic fetal hypoxia causes redistribution of fetal blood circulation. In order to ensure blood supply to the brain and heart, renal blood flow decreases and fetal urine production decreases, leading to oligohydramnios.

3. Amniotic membrane lesions: Certain unexplained oligohydramnios are related to changes in amniotic membrane permeability, as well as inflammation and intrauterine infection.

4. Maternal factors: Hypertensive disorders during pregnancy can lead to reduced placental blood flow. When the pregnant mother is dehydrated and has insufficient blood volume, the plasma osmotic pressure of the pregnant mother increases, which in turn increases the plasma osmotic pressure of the fetus, reduces urine formation, and reduces amniotic fluid.

Normal index of amniotic fluid in pregnant women

The amniotic fluid index is calculated by adding the depth of the amniotic fluid in the four areas of upper, lower, left and right, with the umbilicus of the pregnant woman as the center, during B-ultrasound. The normal value of the amniotic fluid index in the late pregnancy is 8-18 cm. The normal value of amniotic fluid of 3-8 cm refers to the maximum depth of amniotic fluid. B-ultrasound examination indicates the vertical depth of the largest amniotic fluid pool. Less than 2 cm indicates too little amniotic fluid, and more than 8 cm indicates too much amniotic fluid. It is a medical professional term and an important indicator for judging the amount of amniotic fluid. If there is more amniotic fluid, the fetus can grow healthily; if there is less amniotic fluid, meconium accumulation can be caused during the fetal delivery period, and even premature birth or suffocation. B-ultrasound examination indicates the vertical depth of the largest amniotic fluid pool. The depth of amniotic fluid is 3-8 cm, which is the normal amount of amniotic fluid. Less than 3 cm indicates too little amniotic fluid, and more than 8 cm indicates too much amniotic fluid.

What are the dangers of less amniotic fluid

1. The amount of amniotic fluid is too little, the fetus's movement in the uterus is restricted, the sensitivity of the uterus increases, and slight stimulation can cause uterine contraction and abdominal pain.

2. In the early stages of pregnancy, there is less amniotic fluid, and the fetal membrane may adhere to the fetal body, causing fetal malformations or even limb deficiency. If this happens in the middle or late stages of pregnancy, the pressure around the uterus directly acts on the fetus, which can easily cause musculoskeletal deformities, such as torticollis, kyphosis, and hand and foot deformities.

3. If there is little amniotic fluid, you should also be careful about premature rupture of membranes, which may cause miscarriage or premature birth.

There may be these factors for pregnant women to have less amniotic fluid

1. If there is leakage of amniotic fluid, the uterine height is smaller than the actual gestational age, or the baby does not move much, the doctor may suspect that you have too little amniotic fluid;

2. The previous pregnancy had intrauterine growth restriction;

3. Pregnant women have chronic hypertension, preeclampsia, diabetes, lupus, etc.;

4. If a pregnant woman has passed her due date, her doctor may also pay special attention to whether she has a problem with too little amniotic fluid.