What are the later standard data of fetal amniotic fluid index standard?

Nowadays, pregnant women will more or less have problems related to too much or too little amniotic fluid. In short, whether it is too much or too little amniotic fluid, it is obvious that it will have a certain impact on the development of the fetus. Amniotic fluid is one of the important factors for fetal survival, especially in the later stages of pregnancy. The issue of amniotic fluid should be taken more seriously. So what is the index standard for fetal amniotic fluid in the late stage? Let’s learn about the standard of fetal amniotic fluid index.

The standard of amniotic fluid index in late fetus:

Seventh month (28 weeks): At 28 weeks of pregnancy, the fetus gains weight rapidly, about double the weight at 24 weeks. The skin is red and slightly wrinkled. The weight is about 1150g - 1800g and the body length is 35 - 42cm. B-ultrasound showed; biparietal diameter: 6.64 - 7.01 cm, humerus: 4.39 cm, femur: 5.27 cm, chest circumference: 17.37 cm, abdominal circumference: 19.35 cm, amniotic fluid index: 15.2 - 17 cm.

Eighth month (32 weeks): At 32 weeks, the fetus gradually grows, and its bones and internal organs become more mature and strong. At this time, the fetus can already hear sounds outside the mother's body. Body length 42 - 46 cm, weight 2 kg - 2.7 kg. B-ultrasound suggests; biparietal diameter: 7.79 - 8.18 cm, humerus: 5.54 cm, femur: 6.55 cm, chest circumference: 22.3 cm, abdominal circumference: 25.36 cm, amniotic fluid index: 15-16 cm.

Ninth month (36 weeks - 40 weeks) The fetus has reached near maturity, with pink skin, plump subcutaneous fat, and the skin surface covered with vernix caseosa. The fetal head descends into the pelvis. Be prepared for the birth. At this time, the fetus is 50-55 cm long and weighs about 2.8-3.6 kg. Ultrasound results showed: biparietal diameter: 8.40 - 9.31 cm, humerus: 5.59 - 6.29 cm, femur: 6.76 - 7.62 cm, chest circumference: 23.05 - 24.32 cm, abdominal circumference: 25.89 - 28.11 cm, amniotic fluid index: 15.6 - 14.6 cm. Amniotic fluid index: The normal range of amniotic fluid index is 8~20cm. When the amniotic fluid index is less than 5cm, it means that there is too little amniotic fluid and the pregnancy should be terminated as soon as possible. Generally speaking, before 28 weeks (7 months) of pregnancy, because there is more amniotic fluid and the fetus is smaller, the fetus has a larger range of movement in the uterine cavity and the fetal position is easy to change. After 32 weeks (8 months) of pregnancy, the fetus grows rapidly and the amniotic fluid decreases relatively! The normal amniotic fluid depth (DVP) is 3-8cm.

When pregnant women go for prenatal check-ups, they must follow the doctor's arrangements and do relevant examinations. Once they find that the amniotic fluid is abnormal, they must follow the doctor's advice and appropriately increase or decrease the intake of soups and water. Secondly, when the amniotic fluid is abnormal, they must closely observe the fetal movement. Once abnormal fetal movement is found, it is recommended to go to the hospital for examination immediately to ensure that both adults and children are safe.