Hi sometimes it can be genetic. Sometimes I think from heavy lifting, and after watching women push babies real hard I can only wonder. That thought is probably implied from what was said in the paragraph. I learned a long time ago from a book that the patient usually tells a person what is wrong with him. I can offer my deep sympathy. I would use as healthy a lifestyle as possible with walking and no heavy lifting. I would try not to lift more than about 10 pounds including the baby. I would learn to use strollers where possible. Of course one could ask the doctor about weight limits. If there are subsequent babies of course the doctors would need to know as early as the pregnancy occurs, in case there are other decisions to make. A mother needs the heart to help with the birthing process and for oxygen to the baby. Of course oxygen can be given to the baby but it would be real hard on the Mom and there is then potential of loss to both.