Big tech companies like Facebook are notoriously good at sniffing your browsing history and inferring private medical details about you for the purposes of showing you ads. Facebook most definitely knows who's pregnant from their browsing patterns. It almost certainly knows if you're looking at having or have had an abortion too.

I guess that makes sense, I hadn't thought about all the creepy surveillance capitalism stuff.

(although tbh anybody who gathers that sort of data is pretty despicable and I can't imagine them suddenly changing it now).