Prof Martins explains the embryology of malformations and classification systems – ASRM (old and new) and ESHRE/ESGE. Their respective pros and cons are discussed with instructive examples. A study comparing the reproducibility (CUME study) of both is discussed with practical applications. The uses of 3D multiplanar imaging and, volume contrast imaging (VCI), TUI, HD live and Omniview are presented. 2017.