

Switzerland:
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We had it first when I was in 6th grade in biology. This was mostly here are your reproductive organs and here is what happens when you reproduce.
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Second time was in 8th grade, here we had once again everything we had in primary school + a little more in-deph + including a little bit genetics & sexuall illnesses.
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That year we also had a talk about consent, birth controll and struggles of teen pregnancy in houskeeping class.
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Later that year we had STD prevention week, where they explained every known STD and their symptoms including images of the sympthoms+ showed interviews with people afected and the history of the STDs and how they are treated ect. (That was scary AF, but hey we got free condoms)
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Later I moved to the Gymnasium and we had it once again but mostly focusing on genetics.
Edit: this is where I lived in Switzerland and not for the whole country as in Switzetland every Kanton has their own school ecosystem)
The stuff they are cooking up at ITER in france.