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Your Baby: A Developmental Checklist: 4 To 6 Months

Remember that all babies are individuals and develop at their own pace. Premature infants, especially, reach many milestones later than their same-age peers. This checklist should be used only to get a general sense for where your baby is or where he is heading. If you have any concerns about your child's development, consult with your physician.

Physical Development

  • Creeps when on abdomen, usually backwards before forwards.
  • May roll over in both directions.
  • May hurl body forward from crouched position.
  • Sits up for long periods; may need hands on ground for balance.
  • Keeps head level with body when pulled to sitting.
  • Enjoys standing with support.
  • Brings most objects to mouth.
  • Puts feet into mouth.
  • Rakes small items with fingers.
  • Reaches smoothly for items.
  • Explores objects by shaking, hitting, turning, dropping, and throwing.
  • May hold own bottle.
  • May feed self crackers.
  • Moro reflex/startle reflex begins to disappear.
  • Rocks on belly with limbs outstretched (airplaning).

Intellectual Development

  • Understands that items remain even if they can't be seen.
  • Enjoys games like peek-a-boo.
  • Looks for dropped objects.
  • Recognizes sound of own name.
  • Vocalizes to mirror image.
  • Pays attention to very small objects.
  • Alert and awake for l-l/2 to 2 hours at a stretch (close to 50 percent of daylight hours).
  • May sleep through night.

Social And Emotional Development

  • Turns to look at speaker when hears a voice.
  • Reacts to and even imitates inflections in others' voices.
  • Particularly attached to voice of mother.
  • May make wet razzing sound.
  • Distinguishes children from adults, reaching to touch passing children.
  • Begins to show signs of personality.
  • Demands attention from caregivers.
  • Cries when parent or familiar caregiver leaves.

Language Development

  • Says ah-goo or other vowel-consonant sound.
  • Babbles repeatedly when excited.