Getting on a bike sounds like a good option. Or he could take up smoking! My DH was a smoker when we conceived our DD. Since quitting, we have had 3 sons.

Apparently radiographers are more likely to have girls.

Jen, my dad and his brother have 8 children between them - 7 girls and only 1 boy! My mum is one of 4 girls. Maybe I am part of the generation to 'even' it out!