I havent been able to find a calender to test it on, but the ring thing was done to me ages ago before I was pg (and no doubt my sister will do it again when she finds out) but it came up that during my life I would have 2 boys and a girl. Which matched the patriarchal line of DH's Family over the 3 generations that I have seen. It is really strong genetic wise. So I am 90% expecting a boy. Plus my fertility software tells me we had a really high chance of conceiving a boy at the time Ov was due, and I would so love to continue DH's lineage amd name. he is only 3rd generation in Aus from Ireland, his nan still has the cutest accent.