Enabling young children to achieve their full developmental potential is a human right<\/a> and an essential requisite for sustainable development. Given the critical importance of enabling children to make the best start in life, the health sector has an important role and responsibility to support nurturing care for childhood development<\/a>. Many interventions for reproductive, maternal, newborn, and child health (including nutrition, mental health, and HIV prevention and care) have a direct impact on child development. Moreover, the health sector has access to families and caregivers during the early childhood period.<\/p>\n It is primarily the family who provides the nurturing care that children need to develop in the earliest years. Many parents and other caregivers need support to put this into practice. Therefore, the guideline contains four recommendations aimed at caregivers, health professionals, and other workers who can assist them, as well as policy-makers and other stakeholders. The recommendations relate to i) providing responsive care and activities for early learning during the first 3 years of life; ii) including responsive care and early learning as part of interventions for optimal nutrition of infants and young children, and iii) integrating psychosocial interventions to support maternal mental health into early childhood health and development services.<\/p>\n