OK...this is a fun one! The saying is if baby is curled up (looks like a lima bean) in a 8-10 week u/s pic it is a boy and if baby is laying straight, it is a girl. I have never heard this before so thought it would be fun to test it out. Post your u/s pics or say if it works for you.
Here is an example - baby on left is curled and baby on right is straight.
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