Is it a boy or girl? Give our Chinese gender chart a try. Legend says that the gender chart is more than 700 years old and was discovered in a royal tomb. It predicts your baby's sex based on your Chinese lunar age at the time you got pregnant and the Chinese lunar month in which you conceived.
All you need is to know the age of the mother and the month when they baby is expected to be born. It works! A comple of my pregnant friends tried it and it worked. This might help you to determine when to concieve so that your baby is the desired gender.
http://screamingsushi.com/blog3/chinese-pregnancy-calendar/