What can you tell me about the Rh disease in newborns? Does this disease occur while the baby is in the stomach or can it take place when the baby is out? Can this Rhesus incompatibility be prevented if so then how. Can it cause a still birth? I understood that baby’s blood gets mixed up with the mothers but how does that happen. How does one know that the parents are Rh+ and can it be removed before getting pregnant? What medical tests are to be taken, and after pregnancy, what are the symptoms of knowing the newborn is having this disease.