Further analysis looks at who needs friends and family to look after their child for at least 10 hours a week, and satisfaction with the quality of formal childcare.
Mae dadansoddiad pellach yn edrych ar bwy y mae angen ffrindiau a theulu i edrych ar ôl eu plant am o leiaf 10 awr yr wythnos a boddhad rhieni ag ansawdd y gofal plant ffurfiol.