Obstetrics and Gynaecology are two different medical streams. According to the best gynae in Ahmedabad, obstetrics is the study of pregnancy, childbirth and postpartum. An obstetrician treats issues like preeclampsia, ectopic pregnancy and fetal distress etc. While gynaecologist solves reproduction-related health problems like irregular menstruation, ovarian cysts, endometriosis, etc.
Source: Key Differences Between Obstetrics and Gynaecology