To further stimulate an interest in the interpretation of fetal reactions, we have added a new volume of the Green Book. This separate volume includes both user aspects to be considered from published studies as well as those earned from a set of 60 STAN cases. We believe case-based analysis still has an important role to play in the process of learning provided we have a common understanding of the physiology of fetal reactions to the stress and strain of labour, the latter still being the most important part in the safe dissemination of knowledge on fetal reactions and ultimately improved intrapartum surveillance.