nulliparous       
adjective  medical , biology specialized uk/nəˈlɪp.ər.əs/ us/nəˈlɪp.ər.əs/
 未经产的
never having given birth before
  Patients who had had one or more previous live births were quicker than nulliparous patients to see a doctor about the pregnancy. 有过一次或以上分娩经验的患者,会比未经产患者更快地见医生谈怀孕事宜。 
 Malignant diseases of the breast, ovary, and endometrium all occur more commonly in nulliparous women. 乳房、卵巢、子宫内膜的恶行病变在未经产妇女中更为频繁。 
 Compare: primiparousmultiparous
 - More examples
 - The patient is a 78 year old nulliparous woman.
 - Our own studies in young nulliparous women confirm this observation.
 - Hamster embryos were obtained from nulliparous young females.