The abriviation for Obstetrics is Ob.

1) Low Risk Obstetrics

2) High Risk Obstetrics

3) Oncology

J. P. Greenhill has written:

'Obstetrics for the general practitioner' -- subject(s): Obstetrics

'Obstetrics, from the original text of Joseph B. de Lee' -- subject(s): Obstetrics

'Greenhill's Office gynecology' -- subject(s): Female Genital Diseases, Gynecology

'Obstetrics' -- subject(s): Obstetrics

'The miracle of life' -- subject(s): Childbirth, Prenatal care

Harrison H. Sheld has written:

'Obstetrics and Gynecology Review, 1996'

'Obstetrics & Gynecology Review 1992'

'Obstetrics and Gynecology'

M. G. de Bruin has written:

'Bovine obstetrics' -- subject(s): Veterinary obstetrics, Veternary obstetrics