There can be multiple reasons for high levels of these components in the blood. Some key reasons are listed below.
Death of the unborn baby inside the mother’s womb.
If any part of the skull or brain is missing. (Anencephaly).
Intestines or any surrounding organs are defective (Duodenal atresia).
Neural tube defects it’s a serious problem or a condition where the baby’s brain is abnormally developed or there is a problem in the spine.
Genetic abnormality like Turner’s syndrome is a condition where there is a developmental delay as well as there are intellectual disabilities.
Multiple pregnancies or Twin pregnancies.