However, a larger proportion of Asian babies had low birthweights than any other ethnic group in three out of the four years for which there is data available.
Fodd bynnag, roedd gan gyfran fwy o fabanod Asiaidd bwysau geni isel nag unrhyw grŵp ethnig arall mewn tair o'r pedair blynedd y mae data ar gael ar eu cyfer.