A UK primary school is set to teach students that both boys and girls can have periods under a new sex education guidance.
The Telegraph reports the victory for transgender rights campaigners was approved by the city council, as they try to tackle stigma around menstruation.
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The Brighton primary school will also include bins for menstruation products in all toilets.
"Trans boys and men and non-binary people may have periods", reads the council report, entitled Neighbourhoods, Inclusion, Communities and Equalities Committee Addendum.
"Language and learning about periods is inclusive of all genders, cultures, faiths and sexual orientations."
It also calls for transgender students and pupils to be provided with additional support from a school nurse if needed.
The Daily Mail claims the new rules come after a secondary school in Brighton reported they have 40 pupils who "do not identify as gender presented at birth".
Brighton and Hove City Council said in a statement: "By encouraging effective education on menstruation and puberty, we hope to reduce stigma and ensure no child or young person feels shame in asking for period products inside or outside of school, if they need them.
"We believe that it's important for all genders to be able to learn and talk about menstruation together... Our approach recognises the fact that some people who have periods are trans or non-binary."
The same council also reportedly recently released a 'Trans Inclusion Schools Toolkit' to help teachers sensitively treat gender identity.