"So, almost double the recommendations," Scrivin says. What does a teen boy eat in one day? For breakfast, Scrivin's youngest is at about eight Weet-Bix with a heap of yogurt and some fruit.

Mathews said the study pointed to a simple technique to influencing the chances of a male birth: Eating a bowl of cereal for breakfast. "If you want a boy, eat a healthy diet with a high calorie ...