So far, divorce involving minor children was unfortunately considered by authorities only as a purely juridical problem and this approach has often allowed a completely different approach according to the Courts. Now scientific research, also making use of animal models, is demonstrating the biological basis of the problem and the indisputable consequences on the wellbeing and health of children. The research cited in this speech were considered able to give a meaningful contribute to four areas: 1- biological effects on animal models health linked to parental separation 2- psychobiological effects on infant health linked to parental separation and other childhood adversities, 3- biological consequences of parental loss and childhood adversities in humans (more in detail: A-influence on hormones like ACTH, Growth Hormone, Oxytocine, Thyroid hormones and TSH. B - Cytokines as Tumor Necrosis Factor and Interleukine 6 -and consequences on a broad range of diseases-. C- Chromosomes and genes D- Immunitary system. E- CRP levels. D- Influence on puberty and height E- Influence on brain structure) 4-comparison between possible effects of shared and sole parenting on child and young adult health (A-conflict B-parental loss C-general wellbeing). The innovative conclusions are that 1-this argument is primarily a question of public health 2- Shared Parenting policies can prevent several childhood adversities and their long term consequences 3- it is necessary to further harmonize practices in this area, such as in the medical world where shared and common guidelines usually exist.