Mae lles mislif a dysgu am gylchred y mislif yn fandadol o dan y Cwricwlwm newydd i Gymru. Mae’r Cod Addysg Cydberthynas a Rhywioldeb yn nodi'r hyn y dylid ei ddysgu dros amser wrth i blant dyfu.
Menstrual well-being and learning about the menstrual cycle is mandatory within the new Curriculum for Wales. The Relationships and Sexuality Education (RSE) Code sets out the learning which should be taught over time as children grow.