English Collins Dictionary-English Definition & Thesaurus &nbsp. See also: worker participation, Participaction, participator, participant. ACTA. ACTA. abbr. acron.
In a policy statement published in Pediatrics, the American Academy of Pediatrics now advises parents to keep toddlers in rear-facing car seats until age two, or until they exceed the height or weight limit for the car seat, which can be found on the back of the seat.
1 Infant rolls over turning from the stomach to the back first, then from back to stomach - four or five months of age. 2  Sit upright in a high chair (requires development of strength in the back and neck muscles)-four to six months of age.  Infant gradually is able to pull self into sitting positions.