How Much Do 3-Month-Old Babies Weigh?

• Weight of a 3 month old: Weight of a 3 months old baby boy should be 6.4 kg or 14.1 lbs. The weight of a 3 month old female baby should be 5.8 kg or 12.8 lbs. These weights lie at the 50^th percentile on the weight charts used by most doctors to chart growth of infants.

• Height of a 3 month old: Height of a 3 month old female baby should be around 60 cm or 23.6 inches whereas of a male baby should be around 61.5 cm or 24.2 inches. These heights lie at the 50^th percentile on the height charts used by doctors of infants 0 to 6 months old.

Motor Skills

The innate reflexes, including the startle reflex that your baby displayed during the first couple of months, should be gone by now. Your baby’s strength of neck is improving and while you hold them upright you will notice very little or even no wobbling of head. A 3 month old baby should also have enough strength in their upper body to support their chest and head with their arms while they are lying on their stomach and enough strength in their lower body to stretch out their legs and do kicking movement.

Your baby should also show some early signs of eye-hand coordination. Your baby’s hands can come together, open and shut, grab a rattle or toy briefly, swipe at colorful dangling toys and go straight into the mouth.

Sleep

The nervous system of your 3 month old baby is maturing and more milk or formula can be accommodated by his stomach. Due to these changes he can sleep for six to seven hours at a given time. If your baby cries during the night, wait for about thirty seconds before heading into nursery. Many a times, babies go back to sleep themselves after crying for a few seconds. If you go into the nursery at his first sound of crying, he will not learn falling back asleep on his own.

If he cries continuously and you have to go into the nursery during the night, do the essentials. If possible, changing and feeding must be carried out in the dark and then the baby should be transferred back to his crib. Eventually, he will realize that night time is meant for sleeping only.

The daytime schedule of your baby should also be in a routine by this time. Majority of the three month old babies take a few naps of around 1 1/2 to 2 hours every day.

The Senses

“How much should a 3 month old weigh？” is not the only question that you should concern, you should also be aware about the development of the senses of your 3 month old baby. The vision and hearing of your baby are improving. At this age, babies turn their heads, love listening to all kinds of music and smile at the sound of their parents’ voices.

Your baby will still prefer looking at brightly colored toys. This is because it is easier for them to see sharp contrasts. 3-month old babies are fascinated by faces. If you look at him, you will find him staring back into your eyes. Your baby will also stare intently at his own reflection in a mirror of the crib.

Communication

A 3 month old baby is now becoming a unique human being. This is the stage, referred to as hatching, when your baby will begin to come out of his shell and start to react and relate to the world around him. Smiling for pleasure, referred to as social smiles and interacting with people are a part of this process of hatching.

Crying is no more your baby’s primary method of communication. In fact, a 3 month old baby should not cry for more than an hour every day. If your baby’s crying period exceeds this, you should visit a pediatrician, because reflux or another medical problem may be the reason behind this excessive crying.

What You Should Know

Every baby is unique. Don’t be panicked if your 3 month old baby misses a milestone, especially if his was a premature birth. However, do visit your pediatrician if your 3 month old baby hasn’t done the following:

• He hasn’t smiled

• He hasn’t given response to noises

• He hasn’t reached for objects

• He hasn’t followed objects or people with his eyes

Average Height and Weight for Newborn and Infants

Average Height and Weight for Toddlers