KidsHealth.org
KidsHealth is the most-visited site on the Web for information about kid’s health, behavior, and development from before birth through the teen years. There is extensive information on child development, nutrition, fitness, health conditions, etc.
American Academy of Pediatrics
The American Academy of Pediatrics provides information about health topics, diseases and conditions, child development, and child safety.
Dr. Greene.com
Dr. Alan Greene, professor of pediatrics at Stanford, manages a site with health information about children. Dr.Greene’s team of pediatric and health experts offers medical expertise, parental experience and a focus on healthy living in a searchable, interactive library of resources to make raising healthy families easier.
National Institute of Health
This site/agency covers a huge selection of topics and research related to Children’s Health.
100 Baby and Children’s Health Blogs
This site features a compilation of 100 blogs dedicated to kid’s health and emotional and physical development.
There are several sites on the web that offer exhaustive materials and information on different issues related to children’s health. The most visited and recognized sites are webmd, about.com, CDC kids and mayoclinic.