My son was born with an imperforate anus 30 years ago. He was the only one of my four children to have this problem and I am not aware of any other family members in my family or my husband's family to have this defect. He had surgery as a newborn and the doctor said that his was basically a cosmetic issue - basically no other problems other than opening the hole. Now this son is expecting his first child. Should they be concerned about this ?