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Infant Milestones: The First Six Months
Month 1
Physical
Weight may decrease during first week of life. Lies flexed, like in the womb; barely lifts head while on stomach; leg and arm movement consist of uncontrolled writhing and purposeless hand opening and closing; bears no weight on legs; holds hands tightly fisted; can't hold a rattle.
Language/social
Makes demanding cries, grunting throaty sounds, fleeting smiles, sleep grins; discriminates parents' voices; sees best at 8-10 inches; has blurred vision; has erratic sleep and feeding schedule. Smiles involuntarily.
Cognitive
Displays instinctive behaviors that help develop trust, such as learning that cries will be rewarded with comfort or food.
Reviewed by Matthew Hoffman, MD on October 28, 2008
This tool does not provide medical advice. See additional information: 
© 2008 WebMD, LLC. All rights reserved.
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