No sex until 12wks


I received my postive Beta last Thursday dec 21. YAY! So nurse gave me instructions. She said still no sex. I went for bloods again today and nurse called to give instructions. Still no sex. So I asked when and she said “no sexual relations until 12 week.” Has anyone else heard this?! And does this mean no orgasms either!!!!? Sorry if that is TMI... but I don’t understand the reasoning behind it. Help!