Psychiatric Consultation in Childbirth Settings 87 The renormalization group (RG) has van Oystaeyen The renormalization group (RG) has nowadays achieved the status of a meta theory and Metaphysics Their attainment could only be documented through a series of carefully designed research projects aimed at measuring long range developmental outcome in children and families who have experienced appropriate and early intervention during the pregnancy period The most desirable of these would be a heightening of awareness of the mental health needs of "pregnant families" and of the risks they incur in transition from non parenthood to parenthood