Historically, many head shape deformities present at birth disappeared within about 6 weeks because babies were placed in a number of different positions during the day and slept on their tummies at night. Since the Back to Sleep program was initiated in 1992, these head shape deformities often persist because babies sleep on their back all night and spend extended time on their backs during the day in infant carriers, swings, car seats, etc. Parents must be vigilant about changing the infant's position more than in any other period of child rearing. Babies that spend most of their time on their backs in the early months roll and crawl later than usual, which results in even more time before the infant is able to actively reposition themselves. The best way to help your infant's head correct "on its own" is to place your infant in a variety of positions during the time your infant is awake and supervised. This will encourage your infant to actively move their head through a full range of motion, strengthen their neck, shoulder and trunk muscles, and minimize pressure on the back of the head. It is possible that your efforts to reposition your infant will be rewarded with a more symmetrical head shape that does not require further intervention. However, if your infant's head does not change after one month of alternate positioning, make sure your pediatrician understands that you have tried prone and other positions to help make the infant's head more symmetrical, and the skull has not corrected. Then ask your pediatrician if your infant would benefit from a cranial remolding orthosis, and/or request a referral to a craniofacial specialist, neurosurgeon, etc.