What exactly is an ectopic pregnancy?

Fetus outside uterus: When the fertilized egg implants anywhere but inside the womb, the pregnancy is called ectopic, from the greek word for out-of-place. This is a potentially life-threatening condition for the pregnant woman and is practically always non-viable for the fetus (although extremely rare abdominal pregnancies can produce a liveborn frequently at the expense of maternal life). Typically they are tubal.

Outside uterus: Ectopic is a term used to describes when something is outside of its usual location. An ectopic pregnancy describes a situation where the fertilized egg implants in a location outside the uterus.