question

Dev 🍃 • Momma to a beautiful toddler, expecting a little handsome little boy in December 💙👶🏼 | taken 💞💞
So I remember getting the rhogam shot with my daughter when I was pregnant with her, BUT I don't remember them having to take blood BEFORE I even get the shot done. This is my second pregnancy, & I really cannot remember them doing that before , can anyone tell me ?