Is there any way to tell how much your baby weighs through belly measurement?

My doctor doesn't have a fancy 3d/4d ultrasound and I've asked if he could tell me the how much my son weighs and he said he couldn't (I'm worried about a 10lb baby lol) anyways he measured my stomach and said I'm right where I'm supposed to be. I just don't know how accurate all that could be.

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