Prenatal care is always necessary in order to keep your healthy baby healthy even if there are no complications, good and consistent prenatal care can help prevent later complications.
All the germs and pollution and it might take to long to get all of the dirty stuff out of it.
Answer:
Acknowledge their feelings & focus on things they can control.
They can keep themselves occupied
Keep in contact with close loved ones
Limit the amount of media they see and rely on liable news sources