At 15 weeks old, your baby is nearing her fourth month and has mastered most newborn and early infant skills. While the specific time frame for skills development varies widely among infants, notes the American Academy of Pediatrics' Healthy Children website, there are certain skills, including a range of physical and social activities that many babies have mastered by the time they are 15 weeks old and several activities that they may begin to show interest in at this age.
By the time your child is 15 weeks old, he should be able to lift his head up when lying on his stomach and be able to support his upper body with his upper arms to have a better look around the room. His arms and legs are also busy, with his legs kicking and squirming reflexively when placed on his back or stomach. He is also interested in his arms and hands and will likely bat at an interesting toy hung over his crib or play mat.
At 15 weeks your child should be smiling at you and experimenting with her smiles, sometimes smiling at you to engage you, while waiting for your friendly grin at other times, notes the Healthy Children website. Your baby likely enjoys interacting with other people and activities such as having a conversation or looking into a mirror. Your child should also be able to recognize your voice and be able to imitate your common facial expressions.
Other Mastered Skills
Babies who have reached their 15th week should be able to track a nearby moving object and many enjoy staring at faces, especially new or unfamiliar ones, observing expressions and conversations. Speech skills, including some babbling and sound imitations are likely to be seen by this age as well. Her sleeping skills should be settling into a pattern, with two daytime naps, typically taken around the same time each day and an occasional nighttime waking for a feeding or diaper change.
Many babies begin to experiment with rolling over from their front to back at this age and show of their developing motor skills by holding rattles and opening and closing their hands. Your infant may be able to control her arms and hands enough to consistently bring her hands to her mouth, grab interesting objects or possibly transfer them between her hands. She is beginning to recognize other important people in her life and may flash a smile at a sibling, grandparent or familiar babysitter.
- Healthy Children; Developmental Milestones -- 3 Months; January 2011
- Healthy Children; Emotional and Social Development -- Birth to 3 Months; January 2011
- Healthy Children; Movement -- Birth to 3 Months; January 2011
- BabyCenter; Your 3-Month-Old's Development -- Week 3; February 2006
- Parents; Your Baby's Development Week-by-Week; Laura Asmundsson
- Photo Credit Jupiterimages/BananaStock/Getty Images
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