1. Women who eat more calories around the time of conception tend to have sons.

As well as consuming more calories, women who had sons were more likely to have eaten a higher quantity and wider range of nutrients, including potassium, calcium and vitamins C, E and B12. There was also a strong correlation between women eating breakfast cereals and producing sons.

via Think Gene

2. “To calculate the calories you need to maintain your weight, multiply your weight by ten.”

~Submitted to Rules of Thumb by: Dr. Robin Kanarek, in Tufts University Diet Nutrition Letter

Putting the two together, it’s quite likely that #2 may be a boy (even thought the ultrasound indicated a girl). ;)