midwifery       
noun [ U ]  medical uk/ˌmɪdˈwɪf.ər.i/ us/ˌmɪdˈwɪf.ɚ.i/
 助产工作
the job of being a midwife (= someone who is trained to help women when they are giving birth)
  At nursing college she specialized in midwifery. 在护士学校她专修助产学。 
 Improvements in midwifery have reduced death during childbirth. 助产工作的改善降低了分娩时的死亡率。