This chapter seeks to familiarize the readers with the basics of the MRCOG Part 3 examination. The Part 2 and the Part 3 MRCOG examinations aim at evaluating the skills that are expected of an ST5 (specialist trainee 5), who has completed core and intermediate training, in the clinical practice of obstetrics and gynaecology as practiced in the National Health Service (NHS). In a criterion-referenced examination, the minimum standard acceptable for passing the examination has already been decided before the test. If you are able to reach that particular standard, you pass. Else, if you get marks below that standard, you fail. As a result, the standard required to pass the MRCOG Part 3 examination remains consistent between examinations irrespective of the relative difficulty of a particular examination. Format of MRCOG Part 3 examination, objective structured clinical examination (OSCE), core clinical skills domains, curriculum for MRCOG Part 3 examination, good practice guidelines, and preparation for an OSCE examination are covered throughout this chapter.