A tubal pregnancy is a pregnancy that occurs outside the uterus, generally in the fallopian tube. This type of pregnancy is sometimes also referred to as an ectopic pregnancy and cannot be successful, according to WebMD.
Ectopic pregnancies cannot be saved. When this type of pregnancy is discovered, it must be terminated immediately to negate the effects of the pregnancy on the expectant mother. If the pregnancy is allowed to continue, it can cause the fallopian tube to burst, triggering heavy bleeding that can put the woman's life in danger. Damage to the fallopian tube can cause ectopic pregnancy, as WebMD explains. Damage usually results from pelvic inflammatory disease, endometriosis, smoking or exposure of the woman to certain chemicals in utero.