Warm socks

🤣

I'm just chewing the fat here but...

What is the reason behind bringing a pair of warm socks for hsg, hsc, ER or anything <a href="https://glowing.com/glow-fertility-program">IVF</a> related? I did limited research but seems like it is based off Chinese folklore 🤷‍♀️. Anyone's RE explain why this is suggested?