Several couples use wive's tales to guess the sex of their unborn child. The most frequently used one is the pregnancy calendar. With an accuracy rate of 97%, people rely on this even before their first ultrasound.

To use the calendar, simply find the mother's age and add nine months. The age ranges from 18-45. Then you will find the month you conceived and go to where the two columns meet. There you will find either a B for boy or a G for girl. Although it can be used to predict the sex of one child, it is not known how to predict the sex for multiples using the calendar.

The Chinese pregnancy calendar is considered to be 700 years old. It was found in an ancient tomb near Peking. In several cultures, the first born needed to be a son to gain the respect of others. Also, this helped with owning land. The thought was that you needed to have a son born first to make sure of an heir in your family. This calendar was relied on heavily in those days.

Unknown why it was created, there have been many theories floating around about it. Such theories as ancient families using this to predict when they should try to conceive to guarantee the sex of their child. The only known fact at this time is it is based on the Chinese Lunar Calendar.

Most families would use the calendar to find out when they should try to conceive for a boy. They would calculate the mother's age and then try in those particular months that the calendar says they would have a male child.

This is not a scientific method, yet it is considered to be accurate by most. Parents trying to guess the sex of their unborn child should only use this in fun and as entertainment. Wive's tales such as weight gain, cravings the mother gets, and how the baby is carried have been passed down from generation to generation.

The first calendar can be found in the Beijing Institute of Science today. It is visited by many tourists each year. It is also very popular through the internet. Many people go online to try out the calendar through different websites to see what it says.

There are still several people around the globe that rely on the Chinese gender calendar to confirm their chances of having a boy or a girl. The most accurate way is still to have your doctor perform the ultrasound. For some fun, you can go to several websites that offer the chart and see if it is correct for your family.