Development of a 15 Month Old Baby

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Your sweet baby is now a busy toddler who is always on the move. The 15th month of life is considered a milestone period by developmental experts, according to the BabyCenter website. Your toddler may not develop along the exact same time frame as other toddlers her age, but if you have any concerns about the development of your 15-month-old, discuss them with your pediatrician.

Your toddler's second year is filled with milestones.
(Terry Vine/Blend Images/Getty Images)

Growth has begun to slow down in this second year, gaining around 3 to 5 pounds and 4 to 5 inches in height. On average, a 15-month-old female weighs 23 pounds and measures 30 1/2 inches, notes the American Academy of Pediatric's website, HealthyChildren.org. Boys this same age weigh 24 1/2 pounds and measure 31 inches in length, on average. Your toddler's pediatrician charts his growth to ensure he's growing steadily. Now that your toddler is more active, he is beginning to lose some of his baby fat and develop more muscles.

Approximately 90 percent of 15-month-olds have begun walking, according to the BabyCenter website. If she hasn't mastered walking, she should be able to take steps while holding onto furniture. Soon, she will walk down one step at a time and stand on one leg with help. These are gross motor skills. Your toddler is also mastering fine motor skills, such as picking up small objects using her forefinger and thumb. She may scribble with a crayon and build a small tower with as many as four blocks, notes HealthyChildren.org.

As your toddler's mind develops more, he concentrates on every task and learns through play, using things he's learned to come up with solutions to challenges, says HealthyChildren.org. He is attracted to toys with buttons, knobs and switches, and imitates what he sees, like holding his toy phone to his ear. Your toddler remembers where he has hidden things and understands that when you leave him, you eventually come back.

Consequences are hard to understand. Your toddler knows that if he throws a toy up in the air, it comes back down. He doesn't understand that it can come down and hit himself or someone else, though.

Your toddler is happy to play next to peers but isn't quite ready to play along yet. He still has no idea what the concept of sharing is. Help him learn social skills by showing him how to resolve conflicts with words and listening, suggests HealthyChildren.org. When he wants a toy that someone else has, help him find another toy and tell him it's not his turn yet.

Emotionally, your toddler is beginning to become more independent, but he still clings to you at times, especially when he's not feeling well. He may suffer from separation anxiety when you leave his sight, but this lessens with time.

By 15 months, around 75 percent of toddlers talk, notes the BabyCenter website. Your toddler may say "Mama," "Dada," "no," "dog" or "ball." Look her in the eye and acknowledge what she's saying, even if you cannot understand. When you can make out what she's saying, offer a response. By the end of this year, your toddler should say around 50 words. Read to your toddler, point out everyday objects, and say what they are. Select books with various textures to help hold her attention. Your toddler follows simple commands. If she has difficulty understanding, show her, but avoid baby talk, suggests HealthyChildren.org.

By 18 months, your toddler may only take one nap during the day, instead of his usual two naps. He needs 12 to 14 hours of sleep each day, notes the KidsHealth website.

Your toddler is beginning to eat more foods, but it's important to make sure they contain the nutrients he needs. Avoid sweets and snacks with empty calories. He needs two servings of milk, two servings of protein, one serving of fruit, one serving of vegetables and three servings of whole grains each day, according to WebMD. Allow your toddler to feed himself, using his fingers or toddler-safe utensils, to improve his grasp and fine motor skills.

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