How accurate can this be?

Marta

The Chinese Calendar

The Chinese <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">Pregnancy Calendar</a> is based on legend, and has been used to predict whether an unborn child will be a boy or a girl. The chart was buried in a tomb near Beijing for 700 years. The original is in the Institute of Science in Beijing. All you need is the month in which the child was conceived, and the age of the mother at conception.

To use the Chinese <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">pregnancy calendar</a>, you will go down the column until you get to the age of the mother at the time of conception (it could be different if the mother has had a birthday since conceiving).

Then go across that row until you get to the month the baby was conceived. If the square is blue, it’s a boy! If the square is pink a girl is on the way!