Children grow up super quick and if you’re a parent, you know how fast time flies! Each child develops and grows up differently but there are certain developmental milestones you need to be aware of. Children are quick to learn and adapt and it is the parents’ job to help them grow in their environment comfortably and understand their baby’s needs.

Here is a brief guide on what your child’s development by 3 months should look like.


As your baby reaches the 3 months or 12 weeks mark, also called the fourth trimester by some doctors, they should be able to turn their heads 90 degrees. By this time, babies have discovered their hands so they learn to suck on their fingers and thumbs.

They can now recognize different scents and understand textures by touch. Three-month-old babies also have better hand-eye coordination by this point. Your baby should also be able to sit up and even keep their head steady. If not completely, babies should also be able to lift up their arms and torso.


Better hand-eye coordination is also a result of an increased vision in three-month-old babies. They still don’t have any object permanence or depth perception, but their clarity of seeing and hearing things increases. They can grasp objects better and even follow movements.

A 3-month-old baby in a basket near a Christmas tree

Sleep, Food, and Nutrition

By the time your baby is three months old, their nervous system has matured as they are able to adjust to more milk or formula milk now. These changes also allow your baby to sleep for more than six hours, and you can also start having a good night’s sleep now. Most mothers continue to breastfeed their babies, which is a good thing. But your baby should have a sleeping routine by now.

If you have any questions about breastfeeding alternatives or your child’s medical needs, at A thru Z Pediatrics we have expert pediatricians and doctors on board.

We offer a wide range of primary care pediatric services, including vaccinations, ADHD testing San Antonio, well-child visits, Medicaid services, telemedicine services, and more in Stone Oak, San Antonio.

Reach out to us to learn more about the best Pediatric Clinic San Antonio or our services we offer or to book an appointment online.