childbearing
noun /ˈtʃaɪldbeərɪŋ/
  /ˈtʃaɪldberɪŋ/
 [uncountable]- the process of giving birth to children
- women of childbearing age
 - Some women defer childbearing in favour of a career.
 
Oxford Collocations DictionaryChildbearing is used before these nouns:- age