Why are babies born at 30 weeks?

One of the most common causes of premature birth is that the mother has pre-eclampsia, the only way to cure it is by delivering the baby.

The mother or baby may have an infection which triggers premature labor.

The cervix can open slightly and allow the waters to break, so an open pathway for infection means the baby has to be delivered.

The baby may have a condition which can only be treated once it is born, or the treatment may trigger premature labor.

In a multiple pregnancy babies often just run out of room and have to be delivered, also a multiple pregnancy may trigger pre-eclampsia.

Often no one knows is the answer.