An ectopic pregnancy occurs when a fertilized egg attaches (implants) to an area outside of the uterus. Abdominal or pelvic pain that occurs with a missed period is the most common symptom of ectopic pregnancy. Ectopic pregnancy is also called tubal pregnancy or extrauterine pregnancy.

In an ectopic pregnancy, the embryo may implant in a fallopian tube, ovary, or in the abdomen. These organs are not designed to hold the growing embryo. Pain develops when the embryo grows and the area is not able to stretch to accommodate this growth.

Pelvic or lower abdominal pain caused by ectopic pregnancy may get worse when you move or strain. The pain may occur sharply on one side at first and then spread throughout the pelvic region.

Severe cramps during pregnancy, with or without heavy bleeding, may be a sign of a miscarriage. The cramping can be severe and incapacitating or mild. You may also pass large blood clots or grayish or pinkish tissue.

Abdominal pain during later pregnancy, especially closer to delivery, can be caused by other problems, such as premature labor or placenta abruptio. Call your health professional for instructions if you have abdominal pain at any time during your pregnancy.