Obstetric performance of elderly primiparae.
D000328:Adult; D005260:Female; D006723:Hong Kong; D006801:Humans; D008423:Maternal Age; D007744:Obstetric Labor Complications / Q000209:etiology*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000209:etiology*; D018566:Pregnancy, High-Risk; D012306:Risk