National Safety Council offers this checklist for making sure that a car seat is properly located and secured. Make sure the car seat is installed in the backseat -- never in the front.Children less than 1 year old or less than 20 pounds should ride facing the back of the car; older or heavier children can ride facing the front.Make sure the safety belt is securely holding the seat.

Parental Distrust Can Affect Clinical Trials Higher Altitude, Better Dialysis Outcome. The child probably will need a booster seat until he or she is about 4'9" tall and weighs about 80 pounds. The clip should fit at about the level of your child's armpits.If your child is 40 pounds or under, continue using the car seat. Ensure that the seat is snugly strapped in and that the belt has been placed correctly.The harness must fit snugly, too. Sign Up for MedicineNet Newsletters!.

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Switch to a booster seat once your child weighs more than 40 pounds.