title: Social change, migration and pregnancy intervals.
mesh_terms: D000328:Adult; D001721:Birth Intervals; D004641:Emigration and Immigration; D005260:Female; D006801:Humans; D008393:Marriage; D009520:New Zealand; D010298:Parity; D011114:Polynesia / Q000208:ethnology; D011247:Pregnancy; D012922:Social Change