Freeman-sheldon syndrome is a very rare genetic condition. Little is known about why Freeman-Sheldon Syndrome occurs.
Doctors do know it is a genetic condition which can run in some families.
There is nothing that the mother did or did not do during pregnancy that caused this condition. Since so little is known about this syndrome, your best course would be to receive genetic counseling. Freeman-Sheldon Syndrome can follow either a dominant or recessive inheritance pattern. Your child should be treated by a qualified craniofacial medical team at a craniofacial center. This is by no means a comprehensive list of all the craniofacial teams.