Note that only data extracted from the NCCHD is analysed here and that HCWP contacts before 10 days of age and after 3.5 years are not reported in this release.
Sylwer mai dim ond data o’r NCCHD sy'n cael ei ddadansoddi yma ac nad yw cysylltiadau’r Rhaglen Plant Iach cyn 10 diwrnod oed ac ar ôl 3.5 oed yn cael eu hadrodd yn y datganiad hwn.