This may be stupid I need real opinions

I don't care if you are rude or not I'm simply just trying to get information. When a guy cums inside of you and you go pee directly afterwards can you pee out all the sperm/cum or no? Asking bc I am currently ttc. I don't know the answer so this is why I'm asking. If you think I shouldn't have kids because of this you are pathetic. I just want to make sure if what I have been told is correct that no matter what some sperm will have already traveled far enough to where you can't pee it out