(CBS) - The American Academy of Pediatrics says pregnant and breastfeeding mothers should be taking iodine supplements. Experts say, most of the salt in the US diet is from processed food, which does not contain iodine. Iodine is needed to produce thyroid hormone, which is critical for brain development in children. _______________________________________________________________________________________________________________________ (CBS) - The American Academy of Pediatrics is also pushing for less physical contact between boys who play ice hockey. The group is encouraging more non-body checking programs for boys 15 and older. It says body-checking should be reserved for the highest level of competition. Programs for girls never include body checking. Every year, more than 12,000 young ice hockey players are injured or suffer concussions. _______________________________________________________________________________________________________________________ (CBS) - Researchers at NYU say they've bred mice with a mutated gene related to autism and found the mice "overgroomed" their hair. They say that kind of repetitive motor behavior is similar to hand-flapping or rocking in people with autism. They hope additional testing of these genetic mutations will lead to new treatments.