foetology vs tocology

foetology and tocology both are nouns.

Word	Noun	Adjective	Verb	Adverb
foetology	Yes	No	No	No
tocology	Yes	No	No	No

As nouns, tocology is a hypernym of foetology; that is, tocology is a word with a broader meaning than foetology:

foetology: the branch of medicine concerned with the fetus in the uterus
tocology: the branch of medicine dealing with childbirth and care of the mother

Other hypernyms of foetology include midwifery, OB, obstetrics.

foetology (noun)	tocology (noun)
the branch of medicine concerned with the fetus in the uterus	the branch of medicine dealing with childbirth and care of the mother