Every infant and child develops at his or her own unique rate — the process is part of what makes parenting so surprising and rewarding. However, there is a commonly accepted time line of developmental milestones that most doctors follow when measuring our lil ones against the rest of the pack.
Yes, some children develop faster and slower than others and are still within the range doctors consider normal, healthy and on-track developmentally. If you are ever worried about your child's development you should talk to your pediatrician.
See if you've been studying up on your parenting books — or paid close attention to milestones with your wee one — by taking my quiz.