Are infants with flat heads (Plagiocephaly) more likely to have early motor delays?

Overview: Positional plagiocephaly is an asymmetric flattening of the back of the skull, which may relate to prolonged positioning on the back. It is believed that infants with plagiocephaly may have less exposure on their tummy when awake, and therefore fewer opportunities to practice extensor movements against gravity such as lifting the head and trunk. This may influence early gross motor milestone development.