How to do a “hold” (urine)

boymomforever 💙💙🤰 • Mother of five angel babies, a happy and healthy 4yo boy & a 1.5yo boy & last baby and BOY #3 due June 20 ‘23 💙

I want to do what they call a hold so that I can get as much hcg hormone in my urine as possible. Do I just not pee for 4 hours or ??