Hmmm....I still honestly believe that it's all potluck! *L* I mean, sometimes you can follow the family trail but I've always felt its more chance than anything else if that makes sense?

My mum's mum - 7 children (2 boys, 5 girls)
My mum - 5 children (3 boys & 2 girls)

My DH's Grandma - 8 children (4 of each). Most of these children went on to have boys. (Ratio of like 4:1)
My DH's Mum - 3 boys.

I was so convinced I was having a boy, as my DH's brother also had a son first up. Was kind of surprised (but thrilled as I'd always dreamed of having a daughter) when baby turned out to be a girl.