DNB and Diploma are both different degrees and is offered in various subjects including Obs and Gynae. Hence there is no Diploma in DNB. However there is post Diploma DNB in which students can admit through DNB PDCET exam and is specifically for those who have completed Diploma in a particular subject. It’s a 2 year course.

The other DNB course is through appearance of DNB CET. The eligibility is same as MD/MS. It’s a three year course.