What is the normal biparietal diameter at 32 weeks of pregnancy?

The biparietal diameter of the fetus refers to the straight line distance at the widest point of the fetus's head. The biparietal diameter of the fetus is an important data to determine whether the baby's development is normal. You'd better know the standard size of the fetal biparietal diameter, so that you can know whether your baby's growth and development is normal during the pregnancy check-up. So how much is the standard biparietal diameter of a fetus at 32 weeks of pregnancy?

1. Biparietal diameter standard of 32-week fetus

The mean biparietal diameter of a normal fetus at 32 weeks of gestation is 8.17 ± 0.65. The biparietal diameter of the fetus refers to the length of the widest part between the upper and lower sides of the fetus's head, also known as the "great transverse diameter of the head" (BPD). Doctors often use it to observe the growth and development of children, determine whether there is cephalopelvic disproportion, and ensure a smooth delivery.

At full term, it should be 9.3 cm or above. According to general regularity, after the fifth month of pregnancy, it is basically consistent with the pregnancy phase. In other words, the BPD is about 7.0 cm at the 28th week of pregnancy (7th month), about 8.0 cm at the 32nd week of pregnancy (8th month), and so on. After the eighth month of pregnancy, an average increase of about 0.2 cm per week is normal. When the due date cannot be determined based on CRL in the early stage, BPD is usually used for prediction; in the middle and late stages, when determining the baby's weight, it is usually necessary to accurately measure this data.

Experts remind that it is not scientific to use the biparietal diameter of the fetus to determine whether the fetus is male or female. However, the fetal biparietal diameter is used to calculate the weight of the fetus. The formula is baby weight = fetal biparietal diameter * 900-5200 (g).

2. 32-week baby development standards

The fetus is already 32 weeks old, with a body length of about 40 cm, a top-to-rump length (sitting height) of about 28 cm, and a weight of about 1.5-1.6 kg. The baby in the womb today is similar to the baby when it was born, but the body still needs to gain some weight. His fingernails and toenails had long since grown out completely. Some babies have already grown a full head of hair, while others have only a light head of hair. His eyes can distinguish between light and darkness.

If the baby is a boy, his testicles may have already entered the scrotum from the abdomen, but some babies may not enter the scrotum until the day after birth. If it is a girl, her labia majora will be noticeably protruding and close together. This indicates that the baby's genitals are nearly fully developed. The fetus's organs continue to grow and develop, the lungs and intestines are almost complete, and it has the ability to breathe.

Metabolic digestive enzymes. The amniotic fluid that the fetus drinks is metabolized in the amniotic fluid by the bladder. It is training his defecation function after birth. You may find that the baby moves less frequently and more slowly now than before, and your belly will no longer somersault like before.

The seventh basic prenatal check-up is carried out at the 32nd week of pregnancy, including B-ultrasound examination and assessment of the baby's weight. By the end of the eighth month, the fundus of the uterus is between the navel and the sternum, about 25-27 cm high. Pregnant women need to have a routine physical examination every two weeks, and once a week for the last month. It is very necessary, but you don't have to be lazy to go to the hospital for check-up because of walking inconvenience.

The article explains in detail the standard biparietal diameter of the fetus at 32 weeks of pregnancy, and also introduces in detail the indicator values ​​of the baby's development at 32 weeks of pregnancy. If you are a pregnant mother in 32 weeks of pregnancy, then you'd better refer to the content in the article carefully to see whether the growth and development of your product meets the requirements, so that you can have a clear idea.