Extrauterine pregnancy refers to the implantation of a fertilized egg outside the uterus, typically in one of the fallopian tubes, and it is also known as an ectopic pregnancy. There are several synonyms that could be used to describe this condition. Some of the common synonyms include tubal pregnancy, ectopic gestation, and extrafallopian pregnancy. Other less common synonyms include exocarpic pregnancy, heterotopic pregnancy, and abdominal pregnancy. Regardless of the synonym used, an extrauterine pregnancy must be diagnosed promptly since it can be life-threatening if left untreated. The treatment usually involves medication or surgery to remove the ectopic pregnancy.