My neighbor Allison just showed me this Chinese Infant Gender Statistic Chart yesterday. Supposedly, you take your age at the time you conceived and the month that your baby was/will be born...and it tells you your baby's gender.
She said that she used this chart for a high school science project and interviewed tons of women - and it was never wrong. Even though the chart did prove to be right in my case, I remain a skeptic.
Is it accurate for you?