First of all, I'd like to report that all of my families are still generating more boys than girls. In one of my games, last generation the girls finally overtook the boys by 1 since the couple had 4 girls only. Then, in my current generation, they decided that wouldn't do and the couple literally had 4 boys in a row. Then after several years of persistence trying to get them to have another kid, they finally now have a lone girl. Boys are still back on top though.

Now in my first game, I'm wondering if VF2 genetics are indeed random because the first two little girls are not twins, but have the same head. One is 4 (likely soon to be 5) and the other is 3. More was only born about 10 minutes ago.