Congratulations! Your patience is finally paying off as you can now play with your baby for longer hours and she incessantly smiles at you, babbles and blows bubbles. The baby has now entered the 4th month of her life and is soon going to have several new changes mentally and physically. Here we are going to cover the 13th week developments:

• At 13th week, the parents may begin to identify the baby’s unique personality. Your baby is developing with each passing day now, becoming stronger. An average 13 week old baby measures around 23.5 inches and weighs approximately 12.5 pounds.
• The baby can now sit in a semi-upright position with support. The baby is also able to hold head up and support it nicely now. Her hands are open most of the time and ready to grab objects that interest her. Baby’s hands continually reach for mother’s hair, jewelry and she plays with rattles too now. Tonic neck reflex disappears completely by week 13 so that the baby can turn her head to the sides easily.
• The baby’s vision has considerably improved by now, and she can see objects up to 20 feet away. She tracks objects with her eyes and recognizes common facial expressions and responds to them. She recognizes familiar voices and faces and turns her head in the direction of object.
• The baby can now remain alert for around 45 minutes at a stretch. She responds to people by smiling, giggling, whimpering and babbling and has begun to understand that words are composed of syllables.
• If it had not happened by now, the baby will begin to sleep through the night by the 13th week. The baby is now becoming able to distinguish between day and night and sleeps for 7 to 8 hours without being fed.
• The baby requires 5 to 6 feeds each day now. Around 6 oz. of formula is needed per feed. Acid reflex is a common problem at this stage. Acid reflex causes the contents of baby’s tummy to reach her esophagus and she withdraws feedings because of unpleasantness. Burping the baby after feed and holding her upright for a few minutes solves this problem.
   

• The parents have to look for symptoms like vomiting, weight loss, irritability, hiccups, or gagging which indicate that the baby has serious acid reflux. The pediatrician must be consulted in this situation.
• Hand-eye coordination can be improved by giving the child a variety of bright colored rattles to play with.
• To help the baby understand the difference between day and night, keep the feeds small and play with the baby during the day so that she remains active.

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