It is a type of defect which is identified at birth when the mother delivers a baby without a brain and skull.
Such newborns die within a few hours or days after birth.
With a combination of causes such as lack of nutrition and environmental factors, genes are also responsible for anencephaly in newborns.
Pregnant mothers lacking folic acid, having uncontrolled diabetes, taking medications, and being obsessed can give birth to a newborn with anencephaly.