ectopic pregnancy vs gestation

ectopic pregnancy and gestation both are nouns.

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

As nouns, gestation is a hypernym of ectopic pregnancy; that is, gestation is a word with a broader meaning than ectopic pregnancy:

ectopic pregnancy: pregnancy resulting from gestation elsewhere than in the uterus
gestation: the state of being pregnant; the period from conception to birth when a woman carries a developing fetus in her uterus

Other hypernyms of ectopic pregnancy include maternity, pregnancy.

ectopic pregnancy (noun)	gestation (noun)
pregnancy resulting from gestation elsewhere than in the uterus	the conception and development of an idea or plan
	the state of being pregnant; the period from conception to birth when a woman carries a developing fetus in her uterus
	the period during which an embryo develops (about 266 days in humans)