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Growth and Development at four months

Growth

(general info re growth)

Weight
A four month old baby boy weighs anywhere between 5k and 8k
A four month old baby girl weighs anywhere between 4.8k and 7.4k
Weight gains start to become less than they were although some babies keep gaining 300+gms a week.

Length
A four month old baby boy measures anything from 60cm-68cm
A four month old baby girl measures anything from 57cm-66cm

Development

(general info re development)

Large Body Movements
* For most babies the head lag is gone when pulled from lying to sitting
* A lot of babies can take some weight on their forearms when placed on their tummies with legs extended (for others it takes a little longer to do this).
* Some babies are starting to roll from front to back (intentional rolling is extremely variable, some babies don't roll until nine months)
* Some babies can hold both their legs a few centimetres in the air when lying on their backs in the bassinet
* Hands start to be more relaxed and open more often

Small Body Movements
* Clasps and unclasps hands
* Can suck a single finger or thumb as opposed to the whole fist
* Beginning to hold objects and wave them around
* Starting to examine objects with both hands, eyes and mouth

Vision
* Very excited by visual stimulation
* Vision is almost fully developed
* Moves head to follow objects

Hearing and Speech
* Likes sound-making toys
* Turns head to look for sound
* Reacts to sudden loud noise
* Much less crying (usually)
* Increasing talking noises and vowel sounds 'oo' and 'ah'
* Makes talking noises back when spoken to (not all the time)

Social and Understanding
* Anticipates being lifted
* Laughs when played with
* Can discriminate different faces

End of fact sheet

Robin Barker 20(c)00

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