Baby Gender Predictor

The application is based on two methods:1) The theory of blood renovation is based on the fact that human body gets renewed within some certain time, including his blood.
A man has his body renewed every 4 years, a woman - every 3 years.
A baby would have the gender of a parent whose blood got renewed the last.
2) Japanese method is used since ancient times and can predict the gender of a child with a very high accuracy.