ob-gyn
noun /ˌɒb ˈɡaɪn/
  /ˌɑːb ˈɡaɪn/
(North American English, informal)- [uncountable] the branches of medicine that deal with the birth of children (= obstetrics) and the diseases of women (= gynaecology)妇产科 
- [countable] a doctor who is trained in this type of medicine妇产科医生