No sex during pregnancy in Japan?!

Published: May 22, 2022, 12:01 a.m.

I was very surprised when some ladies told their doctor mentioned to avoid sex or that this information was provided on hospital leaflets.

I personally I haven’t heard something similar form any doctor, even though I was in four different facilities during my pregnancy.

Also there are no scientific studies about this topic. So why would the doctors suggest something like that?
Here are some assumptions. Let me know what you think what the reason is? What is your experience?