I understand how difficult it can be to be the mother of a daughter with medical conditions, especially if you have a background in health care, and I hope I can reassure you. SIADH is an extremely rare disorder in pregnancy. A brief review of medical literature by me suggests there is no association between SIADH and any other autoimmune disease, but it is a disease that needs to be monitored closely, along with your daughter s other conditions. She should be under the care of a high-risk obstetrician if at all possible. As far as her living far away from her husband and you, your daughter is a health professional with medical knowledge and I hope that she can advocate for her own health needs, even without her husband, and that she is responsible to turn to her doctor for help if she is not feeling well. She most likely would be hospitalized if she has any serious complications from the SIADH as she would require fluid restriction and constant monitoring of her electrolytes, so people there would take care of her. If she doesn t need to be hospitalized at this time, I am sure her conditions are stable enough for her to be on her own. Unfortunately the course of her health... or anyone s, is beyond our control and it is difficult to cope with uncertainty. I hope this was helpful and best of luck to you and your daughter s health.