So I have a male Sim with the hypofertile trait. He had exactly 2 woohoos with 2 different female Sims and both got pregnant. Their fertility awareness test were at 92% and 100% since they were ovulating. Now how exactly is the chance calculated here? As far as I know male fertility is taken into account, I'd just like to know how exactly and if I should be concerned that this Sim did indeed managed to knock 2 Sims up with this trait.