Cafodd y Proffil Asesu Datblygiad Plentyn ei gyflwyno ar gyfer lleoliadau a gynhelir ym mis Medi 2011, ac roedd bwriad i’w gyflwyno ar gyfer lleoliadau nas cynhelir ym mis Medi 2012 fel y bo pob plentyn yn cael ei asesu wrth iddo ddechrau ar y Cyfnod Sylfaen.
The Child Development Assessment Profile was introduced for maintained settings in September 2011 and was intended to be introduced for non-maintained settings in September 2012 for the assessment of all children when they first enter the Foundation Phase.