In the late stage of pregnancy, it is important to pay attention to changes in one's physical health. Of course, the most important thing is to determine whether one's child is healthy. It is not recommended to give birth to a sick child, as it can be a blow to both the mother and father. Below, the editor will take everyone to pay attention to a question, hoping to be helpful to everyone. What is the normal range of amniotic fluid index at 36 weeks of pregnancy?
Standard amniotic fluid index at 36 weeks of pregnancy
1. Amniotic fluid refers to the liquid inside the amniotic cavity of the uterus during pregnancy. Throughout the entire pregnancy process, it is an essential component in maintaining fetal life. At different stages of fetal development, the source of amniotic fluid also varies. In early pregnancy, amniotic fluid mainly comes from the plasma components of the embryo; Afterwards, as the organs of the embryo begin to mature and develop, other sources such as fetal urine, respiratory system, gastrointestinal tract, umbilical cord, placental surface, etc. also become sources of amniotic fluid.
2. Amniotic fluid index: It divides the uterus into four quadrants: upper left, upper right, lower left, and lower right. The sum of the maximum vertical depths of the amniotic fluid dark zone in the four quadrants is the AFL. If the AFL is greater than 24cm, it is diagnosed as polyhydramnios. If the AFL is between 18-24cm, it is suspected to be polyhydramnios or polyhydramnios. Under normal pregnancy conditions, the production and absorption of amniotic fluid are in a dynamic balance, while polyhydramnios refers to the amount of amniotic fluid in a pregnant woman exceeding 2000ml during pregnancy. If the increase in amniotic fluid volume is slow and the symptoms are often mild, it is called chronic polyhydramnios; If the amniotic fluid rapidly increases within a few days and the compression symptoms are severe, it is called acute polyhydramnios.
3. The incidence of polyhydramnios is about 1% -3%. Appropriate amniotic fluid volume has a protective effect on both the fetus and the mother, and when the amniotic fluid volume is too high, the incidence of maternal and fetal complications is significantly increased. Therefore, pregnant women should pay attention to their amniotic fluid condition during pregnancy and seek medical attention immediately if any abnormalities are found. It is normal for the amniotic fluid index to reach 10-18cm in late pregnancy. The amount of amniotic fluid during normal pregnancy increases with gestational age and gradually decreases from the last 2-4 weeks. At term, the amount of amniotic fluid is approximately 1000ml (800-1200ml).
Normal range of amniotic fluid index
1. Most hospitals use ultrasound to assess the condition of amniotic fluid volume and adopt the amniotic fluid index method to determine whether the amniotic fluid volume is normal. The method is to divide the uterus into four quadrants, measure the maximum depth of amniotic fluid in each quadrant, and then add them up to calculate the total. A total value within the range of 8-27 centimeters is considered normal, less than 8 indicates oligohydramnios, and greater than 24 indicates polyhydramnios. If oligohydramnios is found in late pregnancy, after ruling out fetal abnormalities, a detailed evaluation of the intrauterine condition of the fetus can be conducted to promote fetal lung maturation; Pregnancy should be terminated as soon as the fetus matures. The method of terminating pregnancy can be vaginal induction or cesarean section, depending on the condition of the fetus and mother. In this situation, most can successfully give birth to a healthy baby.
2. If there is polyhydramnios in the late stage of pregnancy, it is abnormal and may be a sign of abnormal fetal development, so it is necessary to seek medical treatment promptly.
3. Polyhydramnios in late pregnancy is a common clinical condition, and it is abnormal to have polyhydramnios in late pregnancy. If you are diagnosed with polyhydramnios, the doctor will ask you to undergo a high-definition ultrasound examination to see if the fetus has any abnormalities. The doctor may also ask you to undergo amniocentesis to see if the fetus has any genetic defects. During your childbirth, the doctor will also closely monitor your condition. Due to excessive amniotic fluid, there is a higher risk of umbilical cord prolapse (meaning the umbilical cord falls out of the cervical opening) or placental abruption during water breakthrough. Both of these situations require immediate cesarean section (caesarean section).
The above is the relevant information compiled by the editor on the normal range of amniotic fluid index at 36 weeks of pregnancy. Everyone should pay attention to the normal range of amniotic fluid index, mainly because amniotic fluid is very important for the health of the child and can cause very serious nutrition to the fetus. Therefore, prenatal examination is very important to detect problems.
