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Definition of ECTOPIC PREGNANCY
: development of a fertilized egg elsewhere than in the uterus (as in a fallopian tube or the peritoneal cavity)
First Known Use of ECTOPIC PREGNANCY
Medical Definition of ECTOPIC PREGNANCY
: gestation elsewhere than in the uterus (as in a fallopian tube or in the peritoneal cavity)—called also ectopic gestation, extrauterine gestation, extrauterine pregnancy
Illustration of ECTOPIC PREGNANCY
Condition in which a fertilized egg is imbedded outside the uterus (seefertilization). Early on, it may resemble a normal pregnancy, with hormonal changes, amenorrhea, and development of a placenta. Later, most patients have pain as the growing embryo stretches the structure it is attached to. Rupture may cause life-threatening bleeding. A tubal pregnancy may result from obstruction of the egg's passage through the fallopian tube. In an ovarian pregnancy, the egg is fertilized before it leaves the ovary. Implantation elsewhere in the abdomen is an abdominal pregnancy.