Algorithms in Obstetrics and Gynaecology presents the core knowledge needed to tackle all situations in obstetrics and gynaecology, in a structured fashion. All algorithms are designed to support rapid decision making in the most clinically relevant situations to minimise the risks of a poor outcome. A range of clinical problems are covered from common non-life-threatening emergencies such as hyperemesis in pregnancy, to life-threatening acute events such as ectopic pregnancy, acute fetal distress or maternal collapse. Each topic is presented as either an algorithm, a care pathway, or table of key information and has been carefully structured to ensure a logical progression of thought to aid anticipation, early diagnosis and prompt and appropriate management. Accompanying key learning points highlight the essential information from the topic. Based on current national guidelines and clinical evidence, the algorithms and care pathways can be used as a reliable and practical resource for day to day practice in obstetrics and gynaecology.