ectopic pregnancy vs ectopic gestation

ectopic pregnancy and ectopic gestation both are nouns.

Word	Noun	Adjective	Verb	Adverb
ectopic pregnancy	Yes	No	No	No
ectopic gestation	Yes	No	No	No

As nouns, ectopic pregnancy and ectopic gestation are synonyms defined as:

ectopic pregnancy and ectopic gestation: pregnancy resulting from gestation elsewhere than in the uterus

Other synonyms of ectopic pregnancy include eccyesis, extrauterine gestation, extrauterine pregnancy, metacyesis.

ectopic pregnancy (noun)	ectopic gestation (noun)
pregnancy resulting from gestation elsewhere than in the uterus	pregnancy resulting from gestation elsewhere than in the uterus