[throwaway406382]

The lead author is in women's studies, not real science.

I quote from their abstract: "...among a convenience sample...39% of people on gender-affirming hormones"

convenience sample means "I asked my friends on social media"

And 39% on gender-affirming hormones! Yes, I know trans is all the rage now, but it's not 39% of the population! It's a highly biased sample.

[ETH_start]

The "39%" is a reference to the percentage of those on masculinizing hormones with breakthrough periods, not the percentage of females on masculinizing hormones.