Those aged 30 to 34 reported the lowest percentage of mental health conditions of all age groups where there were more than 100 women.
Y rhai yn y grŵp oedran 30 i 34 roddodd wybod am y ganran isaf o gyflyrau iechyd meddwl o bob grŵp oedran lle roedd mwy na 100 o fenywod.