I have a question !๐Ÿ’™๐Ÿ’—

So on all these gender guessing ,I just wanna know is it true on the ultrasound the girl has a longer body then a boy do?Because thatโ€™s all I see. The boys body are more shorter and curvy and the girl body are more straight and longer.. see I tried explaining it the best way I can . But thatโ€™s how it seem, from every one picking and guessing the gender