You should use the front-inward position for a child who is younger than 4 months of age, as it allows your child to feel close to you. Meanwhile, the front-outward position is recommended for children between the ages of 4 months and 6 months since this is when your child learns how to hold their own neck. The back and hip carry positions shouldn’t be used until your child is 9 months or 10 months of age.