It is very important that an infant stay rear-facing until at least age one and 20 pounds. The vertebrae in a child's neck are not completely developed until age one. Infants have large, heavy heads on a "weak" stem (neck). That is why infants face the rear of the vehicle - so that their entire body will take the force in a crash. If you turn them around to face forward too soon, their large heavy heads are thrown forward which presents a very high risk of a brain injury, broken neck, spinal cord damage, etc. Your infant should remain rear-facing in a convertible seat until at least age one. You should look for a convertible model that goes rear-facing to at least 30 pounds. Be sure to check the manufacturer's directions on the seat.