childbearing vs parturition

childbearing and parturition both are nouns.

Word	Noun	Adjective	Verb	Adverb
childbearing	Yes	Yes	No	No
parturition	Yes	No	No	No

As nouns, parturition is a hypernym of childbearing; that is, parturition is a word with a broader meaning than childbearing:

childbearing: the parturition process in human beings; having a baby; the process of giving birth to a child
parturition: the process of giving birth

Other hypernyms of childbearing include birth, birthing, giving birth.

childbearing (noun)	parturition (noun)
the parturition process in human beings; having a baby; the process of giving birth to a child	the process of giving birth

childbearing (adjective)	parturition (adjective)
relating to or suitable for childbirth