You haven't mentioned your Category and the Home State you belong to. Neverthless, considering you to be of General Category, this answer is being written. Going by the previous years' data, you might have a chance for MS in OBG&GYN in:

Aarupadai Veedy Medical College

Sree Balaji Medical College.

You have also chances for PG Diploma in Obstetrics and Gynecology in:

Aarupadai Veedu Medical College

Santosh Medical College and Hospital

But if you do not belong to General Category, please do let us know. Alternatively you can also use our NEET PG College Predictor: