''Take a gold or silver ring and tie it to a thin thread. Hold it over your belly while you are lying down. If the ring swings in a circular motion, then you are having a girl. If it swings straight back and forth, then are you having a boy.'' ... so the old saying goes ...
DH suddenly wanted to try it last night! For a laugh we had a go. We used cotton and he dangled the ring over my tum. It did lots of spinning, but swung in quite obvious circles at the same time! We did it 3 times - all circles. So girl then?!
We have no idea of the gender of the baby yet. It's 4 weeks till my 20 week scan when we might get an idea if the ring was right 
Have you had a go?
(this is just for fun and a little bit of genuine curiosity )