Signs of Possible Developmental Delays When a baby doesn’t reach certain developmental milestones by the expected range of time, it could signify a developmental delay. If so, the earlier the delay is identified and treated, the better the outcome. The US Centers for Disease Control and Prevention recommends that parents act early and alert their baby’s healthcare provider about possible delays at the following ages:
At 2 Months Tell your baby’s healthcare provider if your baby does not or cannot: • Respond to loud sounds • Watch objects as they move • Smile at people • Bring hands to mouth • Hold the head up when pushing up while lying on stomach
At 4 Months Tell your baby’s healthcare provider if your baby does not or cannot: • Watch objects as they move • Smile at people • Hold the head steady • Coo or make sounds • Bring objects to the mouth • Push down with legs when feet are placed on hard surface • Move one or both eyes in all directions with ease
At 6 Months Tell your baby’s healthcare provider if your baby does not or cannot: • Try to get things within reach • Show affection for caregivers • Respond to sounds • Easily bring objects to the mouth • Make vowel sounds • Roll over • Smile, laugh or squeal Tell the healthcare provider, as well, if your 6-month-old seems either very stiff (with tight muscles) or very floppy (like a rag doll).
At 9 Months Tell your baby’s healthcare provider if your baby does not or cannot: • Sit, even if helped • Bear weight on legs, with support • Babble (“baba”, “mama”, “dada”) • Respond to name • Look where you point • Engage in back-and-forth play • Transfer toys from one hand to other
At 1 Year: Tell your baby’s healthcare provider if your baby does not or cannot: • Crawl • Stand when supported • Look for things he/she sees you hide • Say single words (such as “mama” or “dada”) | 
