Yes, you can use a travel system with a newborn, and many parents use travel systems for the primary stroller types. The system includes an infant-only car seat to attach to the stroller base, making the transition from your car to the stroller quicker. In addition, the travel system comes with a reversible seat, allowing your kiddo to face you until they're ready to sit up in the stroller. An infant car seat is designed for infants of all ages, and it's created specifically to fit newborns in the stroller and motor vehicles. It would help if you had an infant car seat before leaving the hospital with your newborn. However, rear-facing car seats support children up to 35 pounds, so as the baby grows, the car seats are impractical to use with the travel systems. The AAP recommends using infant car seats for extended periods when babies are 50 pounds. Then, the infant car seat will be OK for car rides, but not for the travel system when your baby outgrows the allowed size limits. You will need another stroller to ensure the children ride safely.