MRCOG Part 1 has a pass rate that sits between 35 and 45 percent per sitting. Most of the doctors who don’t clear it are not underqualified. They are under-prepared in specific, fixable ways — skipping the domains they find dry, starting question practice too late, and using the last few weeks for new reading instead of consolidation.

This guide draws on the preparation strategies of doctors who passed in 2024 and 2025, the RCOG’s own published guidance, and what the global O&G exam community consistently identifies as the approaches that work. The goal is to give you a clear picture of what this exam demands and how to meet it.

What the Exam Is Actually Testing

MRCOG Part 1 covers the basic and applied sciences underpinning obstetrics and gynaecology — not clinical decision-making, which is Part 2’s territory. The exam runs as two separate papers on the same day, each containing 100 Single Best Answer questions over two and a half hours, with a one-hour break between them. Your result is based on the combined score across both papers, with no minimum threshold per paper.

There is no negative marking. That fact changes your exam-day strategy fundamentally: leaving any answer blank is a guaranteed loss, while an educated guess at a five-option SBA still gives you a 20 percent chance on your worst question. Attempt every question.

The pass mark varies per sitting and is set using the modified Angoff method by a panel of RCOG examiners. It typically lands between 60 and 70 percent. Strategic, consistent preparation aimed at reaching 70 to 75 percent gives you a comfortable margin — which matters more than people realise, because exam-day performance rarely exceeds practice performance.

Know the Four Domains Before You Study Anything Else

Starting their preparation almost always end up with uneven coverage — usually strong in anatomy and physiology, weak in biophysics and statistics.

Print the syllabus. Treat it as a checklist you revisit monthly. The subjects you most want to skip — statistics, biophysics, biochemistry pathways — are exactly the ones that appear on exam day and trip otherwise well-prepared candidates.

Statistics and biophysics feel low-yield because they are not glamorous. But 5 to 10 questions on data interpretation and statistical methods appear in every sitting.

These are learnable, predictable, and consistently under-revised. Getting them right is one of the more reliable ways to build your margin above the pass mark.

How Much Time Do You Need?

Three months is the minimum for candidates with a strong basic sciences background. Six months is the more forgiving target for those who have been in clinical practice for several years and need to rebuild that foundation from scratch.

The practical breakdown is two to three hours of focused study per day. That schedule — maintained consistently without cramming peaks and troughs — covers the syllabus and allows time for proper revision. Candidates who study in burst-and-rest cycles, banking on a final three-week intensive, consistently report that the paper felt broader than they expected.

For doctors managing a house job or clinical post alongside preparation, the honest advice is to plan for the longer timeline. Trying to compress six months of material into ten weeks while on-call is where most first attempts are lost unnecessarily.

Subject Priorities and Approximate Coverage

The RCOG does not publish official subject weightings, but candidate recall data and prep community consensus offer a consistent picture of how questions distribute across topics:

Anatomy, physiology, endocrinology, and pathology deserve the most time — not only because they carry the highest question volume, but because they underpin everything else. Embryology and genetics are worth studying mechanistically: the questions often present as congenital scenarios where knowing the developmental sequence is the difference between reasoning to the right answer and guessing.

The Books That Form the Core of Preparation

MRCOG Part One: Your Essential Revision Guide by Alison Fiander and Baskaran Thilaganathan is published by Cambridge University Press in partnership with the RCOG — and that collaboration matters. This is not a third-party summary; it is developed by the people who write the exam. It covers anatomy, physiology, embryology, pharmacology, and pathology in a format built for active revision rather than passive reading.

Revision Notes for the MRCOG Part 1 by Anantharachagan, Sarris, and Ugwumadu — also a Cambridge/RCOG publication — is the companion volume. Where the Essential Revision Guide builds understanding topic by topic, this book gives you a concise, note-format reference for rapid review and the final weeks before the exam. Use both together, not one instead of the other.

Basic Sciences for Obstetrics and Gynaecology by Tim Chard and Richard Lilford remains the reference that the RCOG itself recommends for candidates who want deeper mechanistic understanding of the science. It is a textbook rather than a revision guide — use it when one of the core books raises a concept you genuinely don’t understand, not as your primary daily read.

For anatomy specifically, Gray’s Anatomy for Students is worth having alongside the RCOG texts for its pelvic and reproductive anatomy diagrams. Applied anatomy questions — which nerve supplies which structure, what is damaged in a specific injury pattern — are far easier to visualise than to learn purely from text.

Building the Study System That Actually Works

Start with physiology and anatomy in week one — not because they carry the most questions, but because they are the interpretive framework for almost everything else. Endocrinology, embryology, pathology, and pharmacology all make considerably more sense once you have a working understanding of how the reproductive system functions normally.

Introduce SBA practice early — from the end of your first month, not your last. The SBA format tests applied knowledge, not recall. A question about pelvic anatomy does not ask you to name a muscle; it describes a clinical scenario and asks what was damaged. The gap between knowing a fact and being able to apply it under time pressure is a skill that develops through sustained practice, not through reading alone.

Keep an error log throughout your preparation. Every wrong answer is a data point — not a reason for anxiety, but a specific gap to revisit. Before each study session, spend ten minutes going through your recent errors. That targeted repetition builds the kind of retention that lasts into the exam room, as opposed to the kind that fades by the morning of the sitting.

If the final four weeks of your preparation involve reading new material, the plan has gone wrong. The last month is for consolidation — timed mocks, error review, and reinforcing what you have already learned, not extending the syllabus.

Run at least three full timed mock sessions before your exam, spaced across the final six weeks. Each mock should replicate the actual exam conditions: 100 SBAs in 150 minutes, no interruptions. The second paper in the real exam arrives after two and a half hours of concentrated work. Candidates who have not practised that level of sustained focus find the afternoon paper noticeably harder than the morning.

• Months 1–2: Syllabus-mapped theory: anatomy, physiology, embryology, biochemistry — SBA practice introduced from month two
• Months 3–4: Endocrinology, pharmacology, pathology, microbiology, genetics — daily SBA practice alongside reading
• Month 5: Statistics, biophysics, clinical data interpretation — timed mock exams, error log review
• Final 4 weeks: No new topics. Timed mocks, both RCOG revision texts, targeted error revision only

Prepare with PrepXperts

Our MRCOG Part 1 programme at PrepXperts Online Academy is designed around the specific challenges international candidates face: rebuilding basic science fluency while in clinical practice, understanding the SBA reasoning style, and structuring a preparation plan that holds together over months rather than weeks.

Our mentors have passed MRCOG Part 1 and know where the paper is harder than people expect. If you are starting your preparation or planning a second attempt, we can help you do it properly. Reach out via WhatsApp or visit the PrepXperts website to find out more about our structured programme.