Boy or Girl? Predict your future baby's gender!
Baby Gender Predictor 2010 is a small and easy to use free program for a prediction of a baby gender in several popular ways: Chinese method, Japanese method and Blood Age method.
Chinese and Japanese methods are ancient ways of a baby gender prediction and Chinese method is based on the Chinese lunar calendar. Blood Age method is based on the theory of men's and woman's blood updating depending on date of their birth.

Source : justladycalendar.com