Infant age at birth

These days it is not always easy to ‘say’ how old baby is. We know his birth date, but what is his developmental age. Was he premature ? How many weeks? Was he considered ‘full term’?

Obstetricians now consider that a full term infant is one who has completed 38 weeks of gestation. If baby was over due by two weeks he would be 42 weeks gestation – this 4 week variation is a ‘long time’ in infant development and should be taken into consideration when we are assessing normal development.

Nerve growth and maturity determines which muscles are able to do e.g adults cannot be successful with toilet raining a toddler, until the nerves to the bladder are matured sufficiently for voluntary control to be possible.