“…Ideally, this is best managed by a nurse or counsellor who is familiar with the patient. If a cardiac malformation is 'duct-dependent', that is, either the systemic or pulmonary circulation is supplied or augmented by ductal flow, it is optimum to deliver the mother at, or near, the cardiac centre where surgical intervention will take place (Chang et al, 1991;Bonnet, 1999;see Yates, this issue, pages 1143see Yates, this issue, pages -1149. When the decision has been made to deliver in the tertiary centre, transfer is usually arranged between 30 and 34 weeks' gestation, to minimally inconvenience the mother, but at the same time to allow her to become familiar with a new obstetrician and hospital in time for her delivery.…”