"Citation needed" is a lazy way to throw FUD at an argument; if someone who didn't even leave the comment you are responding to can spend 30 seconds to find the citation on Google to answer your question, you could have done so yourself instead of demanding other people cite every single thing they say lest they aren't believed.
Hormonal birth control boasts clot rates of 1 per 10k, yet we hand that out like candy to little girls. Yet this is considered "too dangerous..."
Edit: mods locked my account for this, lol. Some of the idiots replying are purposely conflating progestogen stats with non-progestogen stats, which is dishonest at best and willfully evil at worst. 2/3 of the market causing clots is fine? What a braindead take. I expected better of the HN crowd.