female offspring vs child

female offspring and child both are nouns.

Word	Noun	Adjective	Verb	Adverb
female offspring	Yes	No	No	No
child	Yes	No	No	No

As nouns, child is a hypernym of female offspring; that is, child is a word with a broader meaning than female offspring:

Other hypernyms of female offspring include female, female person, kid.

female offspring (noun)	child (noun)
a child who is female	a young person of either sex
	a human offspring (son or daughter) of any age
	an immature childish person
	a member of a clan or tribe