Automated Fetal Cardiac Function in Babies Affected by Heart Diseases

The goal of this international multicentre prospective observational cohort study with a nested case-control study is to test some automated fetal heart functional parameters in healthy babies compared to those affected by a congenital heart condition. The main questions it aims to answer are: * If there is a significant difference between the two populations of infants * Whether these parameters could significantly improve the predictive value of actual cardiovascular profile score to predict hydrops Participants will be offered two automated cardiac function assessments between 27+6 and 29+6 gestational weeks and between 34+6 and 36+6 weeks of gestation. Functional parameters will be compared between the two study groups and evaluated over time.