The theory behind the Chinese calendar is that this centuries-old lunar chart can predict your baby's gender. The ancient chart - which is said to be over seven centuries old - was reportedly authored by a Chinese scientist, and discovered in a Royal tomb. According to legend, the chart is able to predict you child's gender based upon YOUR age and the month of conception.
We found several different Chinese calendars while we were pregnant, and had about a 50% success rate. There are moms that swear by the accuracy of the charts, and others that feel just the opposite. We are providing the following links as entertainment purposes, only. We definitely suggest you wait to paint the nursery until after the ultrasound confirms the gender . . .http://www.webwomb.com/chinesechart.htm