Physiology underpins almost every clinical decision in Obstetrics and Gynaecology, which is why it features so heavily in the MRCOG Part 1 exam. Our free MRCOG Part 1 Physiology revision notes give you a clear, structured way to understand how the body works in health and how it adapts in pregnancy.

Mapped to the RCOG Part 1 syllabus, the notes cover the maternal adaptations to pregnancy across the cardiovascular, respiratory, renal, haematological and gastrointestinal systems, along with placental function and transfer, fetal circulation and the changes at birth, the physiology of labour and lactation, and fluid and acid-base balance.

Each topic focuses on the key mechanisms and normal values that are commonly tested in single best answer (SBA) questions, helping you understand the "why" behind the facts. They're free to access and designed to work alongside your question practice.

Choose a topic below to get started.