How big does a fetus\’ head need to be to be considered a deformity?

Definition of fetal head size

Fetal head enlargement is different from other malformations and cannot be directly divided by numbers. Medically, fetal head circumference refers to the length of the maximum circumference of the fetal head. If it exceeds about twice the average, it may attract the attention of doctors. According to statistics, the average head circumference of most newborns is between 32-36cm. If the fetal head circumference is outside this range, it can usually be judged as having a large head.

Possible causes of fetal head enlargement

1. Heredity: One of the main factors causing a large fetal head is heredity. If the mother\’s family has a genetic trait for large heads, the newborn\’s head circumference may also be larger.
2. Abnormal maternal sugar metabolism: If a pregnant woman suffers from diabetes or insulin resistance during pregnancy, it may cause the fetus to have a larger head and increase pain during delivery.
3. Polyhydramnios: If the fetus has too much amniotic fluid, it will easily cause the fetus\’ head to bulge upward, causing the head circumference to increase.

The impact of an enlarged fetal head

1. Increased risk of childbirth: When the fetus has a large head, vaginal delivery may prolong the labor process, increase the difficulty of delivery, and easily cause danger to the mother and baby. Therefore, for pregnant women whose fetuses have a large head, it is recommended to choose a caesarean section as much as possible to ensure a smooth delivery.
2. Possible effects on fetal health: A larger fetal head may lead to problems such as a narrow entrance to the fetal pelvic cavity, facial injuries, and neurological disorders.

How to reduce the risk of fetal head enlargement?

1. Control blood sugar levels during pregnancy: If pregnant women suffer from diabetes, they need active treatment, control their diet, and try to avoid excessive fetal head circumference.
2. Regular prenatal check-ups: Pregnant women need to have monthly prenatal check-ups to ensure the health of the fetus. If the head is too large, it can be dealt with in time.
3. Active response: If pregnant women have found that the fetus\’ head is too large, they need to actively respond, choose a suitable delivery method, and conduct prenatal delivery training according to the doctor\’s recommendations to reduce pain during delivery and improve the success rate of natural delivery.

Summary

Fetal head deviation will have an impact on the health of the mother and baby, and requires the attention of pregnant women and doctors. During pregnancy, you need to pay attention to diet control and monitor fetal development. You should actively carry out prenatal training before delivery to reduce the pain during delivery. If a pregnant woman has discovered that the fetus\’ head is too large, she should consult a doctor as soon as possible and receive active treatment, and choose an appropriate delivery method based on the doctor\’s advice. At the same time, doctors also need to conduct regular examinations and monitoring of fetal development to ensure the safety of mother and baby.

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