This application is based on the famous Chinese Birth Calendar.

This is FIRST app to predict the gender
on the exact day of month by converting solar calendar to lunar calendar.

Chinese Birth Calendar was initially created under
lunar calendar.

There will be a big difference if using solar calendar.

Under Lunar Calendar, mother is one year old
once born.
Age will be added upon celebration of each
spring festival.
So lunar age is one or two years older
than the solar age depending on calculation.

This application calculates ovulation period and
tells you when you will have better chance of
conception.

During regular 6 days ovulation period, first 3
days will have a better chance to have a girl.
And It is easy to have a boy during last 3 days.

How to use:
Step 1: Please select mother's birthday. It will be
converted to Chinese Lunar Date and calculate
mother's lunar age.
(1 or 2 years older than your real age)

Step 2: Please select mother's first date of the last
period. Combining with Step 3, it will be used to
calculate the ovulation period to tell you when
you will have better chance of conception.

Step 3: Please select mother's cycle length.
Combining with Step 2, it will be used to calculate
the ovulation period to tell you when you will
have better chance of conception.

Result: The application will tell you boy or girl
by a lovely icon on each day. The date
highlighted in red indicates ovulation period.
During the ovulation period, you will have
the best chance to conceive a boy or girl as
indicated by the icon.

You can also move the calendar backward
to predict gender if you are already pregnant.