Pregnancy is a wonderful time in any women’s life, but during that time many odd things are happened that makes the women to frighten. The following listed are the most terrifying pregnancy problems that can happen during the time of pregnancy.The Rh-Incompatibility occurs during pregnancy if a mother has Rh-negative blood and her baby has Rh-positive blood. The Rh represents a protein on RBC cells. If you have Rh factor you are Rh-positive; if you don’t have you are Rh-negative.During pregnancy, especially at the time of delivery this Rh-factor is passed from parents to the children through the genes or vice versa. If you are Rh-negative and your child is Rh-positive then your body will react to the baby’s blood as a foreign substance.