From the moment babies are born, they respond to the world around them. Their reactions — being calmed by a parent's embrace or startled by a loud sound — are examples of normal infant development. Doctors use milestones to tell if a baby is developing as expected. There's a wide range of what's considered normal, so some babies may gain skills earlier or later than others. Babies who were born prematurely may reach milestones later. Always talk with your doctor about your baby's progress. Here's what your newborn might do: Communication and Language Skills turns his or her head head toward a parent's voice or other sounds cries to communicate a need (to be held or fed, to have a diaper changed, or needing to sleep) stops crying when a need is met (when picked up, fed, changed, or put down for a nap) Movement and Physical Development moves in response to sights and sounds rooting reflex: turns toward breast or bottle and sucks when a nipple is placed in the mouth Moro reflex (startle response): when startled, stretches arms and legs out, then curls them back in fencer's pose (tonic neck reflex): when head is turned to one side, straightens the arm on that side while bending the opposite arm grasp reflex: holds a finger placed in the palm; toes curl when touched on the sole of the foot Social and Emotional Development soothed by a parent's voice and touch has periods of alertness Cognitive Skills (Thinking and Learning) looks at faces when quiet and alert follows faces When Should I Call the Doctor? Every child develops at their own pace. But if something concerns you, tell your doctor. Also, tell the doctor if your baby: doesn't suck well at the breast or on a bottle nipple has an arm or leg that seems weaker than the other is very fussy or hard to soothe Back to Articles Related Articles Learning, Play, and Your Newborn Play is the primary way that infants learn how to move, communicate, socialize, and understand their surroundings. And during the first month of life, your baby will learn by interacting with you. Read More Movement, Coordination, and Your Newborn It may seem like all babies do is sleep, eat, and cry, but their little bodies are making many movements, some of which are reflexes. Read More Your Child's Checkup: Newborn Find out what this doctor's checkup will involve after your baby arrives. Read More Your Newborn's Growth A newborn's growth and development is measured from the moment of birth. Find out if your baby's size is normal, and what to expect as your baby grows. Read More Your Newborn's Hearing, Vision, and Other Senses Your newborn is taking in first sights, sounds, and smells while learning to explore the world through the senses. What are your baby's responses to light, noise, and touch? Read More Feeding Your Newborn These guidelines on breastfeeding and bottle feeding can help you know what's right for you and your baby. Read More Medical Care and Your Newborn By the time you hold your new baby for the first time, you've probably chosen your little one's doctor. Learn about your newborn's medical care. Read More Your Child's Checkup: 3 to 5 Days Find out what this doctor's checkup will involve a few days after your baby is born. Read More Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.