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Infant development: Milestones from 4 to 6 months

When something's not right

Your baby might reach some developmental milestones ahead of schedule and lag behind a bit on others. This is normal. It's a good idea, however, to be aware of the signs or symptoms of a problem.

Consult your baby's doctor if you're concerned about your baby's development or your baby:

  • Has very stiff or tight muscles
  • Seems extremely floppy
  • Reaches with only one hand
  • Hasn't shown any improvement in head control
  • Doesn't respond to sounds, such as by startling to sudden loud noises
  • Doesn't reach for or bring objects to his or her mouth
  • Doesn't attempt to roll over or sit
  • Has an eye or eyes that consistently turn in or out
  • Doesn't babble
  • Doesn't seem to enjoy being around people or spontaneously smile

Trust your instincts. The earlier a problem is detected, the earlier it can be treated. Above all, delight in your baby's discoveries and abilities.

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