Travel System prams are designed for ease of use and give you a complete package that grows with your child.They will include a carrycot for your newborn upto about 6 months, seat unit from 6 months upto about 3 years and a group 0 car seat suitable from newborn to 9 months.
Having a carrycot will give your newborn a very safe and secure enviroment for the first 6 months, ensuring they can lay completley flat. Choose a travel system where the seat unit can be either forward or rear facing, as in the early months babies like to see faces and your more likley to speak to your child whilst walking. This will help greatly in the development of speach.
The car seat will sit on the chassis of your travel system making it easier to transport baby from car to pram. However it is advised by health professionals not to leave your baby for long periods of time in a car seat, as newborns need to lay completley flat.