A 17-year-old pupil from the Llanishen area of Cardiff started a petition calling for labelling on tampons and sanitary pads.
Molly Fenton discovered there was no UK law that there should be labelling to show what period products are made from.
She says the amount of plastic they contain and potential health risks should be highlighted.
Molly has been campaigning to raise awareness of issues to do with periods for a several months.
She runs a ‘Love Your Period’ page on Instagram with more than 2,000 followers, where she answers questions from young girls who are unsure of how to talk about their periods.
Molly said she also gets questions from parents who want to know how to approach the subject with their children.
Julie Morgan has arranged for Molly to meet the Welsh Minister with responsibility for plastic waste and packaging, Hannah Blythyn, at the Assembly.
The pair will discuss what needs to be done to bring in labelling of period products.