Have you noticed how your baby's tiny fingers curl around yours or close into fists? Or how your little one startles at a loud noise? Your baby was born with these and other reflexes, which will get less noticeable as your baby grows. 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 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 are some new skills your baby may have: Communication and Language Skills startles at loud noises makes sounds other than crying Movement and Physical Development keeps hands in tight fists arms and legs move equally on both sides when lying on the tummy, holds head up briefly Social and Emotional Development recognizes parent's voice when upset, responds to a parent's cuddles, voice, and affections becomes alert when hearing a pleasant sound, like music Cognitive Skills (Thinking and Learning) will stare at an object placed in front of the face, especially something brightly colored follows faces When Should I Call the Doctor? As your baby becomes more alert, he or she will watch you constantly. And you'll be watching your little one closely too. So this is a good time to watch for any subtle signs that could point to a problem. Tell the doctor if your baby: has one eye that is crossed or eyes that don't line up in the same direction does not respond to pleasing sounds, such as a soft voice or gentle music has legs or hands that do not move in unison: for example, only one leg kicks or just one arm shakes Back to Articles Related Articles Your Baby's Growth: 1 Month Put away those newborn clothes. This month your baby will grow at a surprising rate! Read More Your Baby's Hearing, Vision, and Other Senses: 1 Month Your baby is experiencing the first sights, sounds, and smells of the world through all five senses. What are your baby's responses to light, noise, touch, and familiar faces? Read More Your Child's Checkup: 1 Month Find out what this doctor's visit will involve and what your baby might be doing by the first month. Read More Movement, Coordination, and Your 1- to 3-Month-Old The reflexes they had just after birth start to disappear as babies this age gain more control over movements and interact more with their environment. Read More Feeding Your 1- to 3-Month-Old Whether you've chosen to breastfeed or bottle-feed your baby, your infant will let you know when it's time to eat. Read More Medical Care and Your 1- to 3-Month-Old You probably have lots of questions about your baby's health. When should you call the doctor, and what medical care should you expect for your baby at this age? Read More Learning, Play, and Your 1- to 3-Month-Old After learning to recognize your voice, your face, and your touch, your baby will start responding more to you during these months and even give you a smile! Read More Sleep and Your 1- to 3-Month-Old At this age, babies generally have their days and nights straightened out. Many infants even "sleep through the night," which means 5 or 6 hours at a time. 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.