потомство означава в английски

offspring [offspring]▼(plural or collective offspring (only males, only females, both sexes or sex unspecified))
noun
[UK: ˈɒf.sprɪŋ] [US: ˈɒf.ˌsprɪŋ]

progeny [progeny]▼(offspring)
noun
[UK: ˈprɒ.dʒə.ni] [US: ˈprɑː.dʒə.ni]