If you are pregnant and are having abdominal pain with or without vaginal bleeding there is a chance that you are having a threatened miscarriage. Some pain or bleeding may occur in a NORMAL PREGNANCY. But pain may also be a sign of a MISCARRIAGE or an ECTOPIC PREGNANCY (baby growing in the Fallopian tube or other pelvic structures instead of the uterus). A miscarriage is the loss of a baby before the 20th week of pregnancy. As many as 50% of all pregnancies end in miscarriage. Most of the miscarriages that occur in the first trimester of pregnancy are caused by chromosomal abnormalities in the baby. Dr. Carlo Oller Board Certified Emergency Physician Please visit my website, www.DrER.tv make sure you subscribe, comment, and share! That is the best way to show your support.