Fetal spina bifida may be caused by congenital genetic factors, viral infections, and drug abuse. 1. Congenital genetic factors: If both or one of the spouses have chromosomal abnormality and there is a family history of giving birth to newborns with congenital neural tube defects in the pregnant woman’s family, the probability of fetal spina bifida will be higher. 2. Viral infections: Pregnant women have a high chance of being infected by viruses during pregnancy, which can easily lead to the development of dominant spina bifida in the fetus. 3. Drug abuse: If a pregnant woman does not follow the doctor’s instructions to take medication during pregnancy, the medication may pass through the placenta into the fetus, interfering with the development of the fetus, which will lead to the phenomenon of fetal spina bifida. If you find spina bifida in the clinic, you should communicate with your doctor and undergo surgery as soon as possible to avoid delaying your condition.