Is there anything that can be done to go full term when moth has rh neg and father has rh pos or will they not be able to have children?

Term preg likely: Unless the mother has previously been sensitized and has antibodies, an RH - mother can carry an Rh+ baby to term. Rhogam is a product given to the mother usually at 28 weeks to reduce the likelihood of developing antibodies and then again after birth if the baby is Rh+. Multiple doses have been given over the past and have been found to be safe for the infant and give protection to the mother.

Antibodies: As long as Mom has no antibodies against the Rh + blood group she should experience a normal pregnancy. She needs to be under the care of a specialist to monitor her for antibodies and to make sure she gets routine required shots. Rh disease is totally preventable if managed appropriately. All the best.