From another thread, those that want the spoiler, here it is.
The last episode of Young Sheldon is all about the very first ' relationship agreement' that Sheldon devised when he was 9.
The episode ends with the voiceover (which is Jim Parsons) saying that he would go on to devise several relationship agreements..for his roommate, his wife and even his children.
So clearly there will be more than 1 child (twins maybe as he is a twin himself?). I assume with Amy as he hates change.
No idea if that will be the end but they are obviously tying the 2 series together and I love the thought of it ending with the birth of twins 😊