> Now from the third day onward, take one cup
> decoction, first thing in the morning, for four days regularly in a
> month. This process must be repeated for a few months i.e. minimum
four
> months (on the same dates), you may find the rays of hope.

Based on built-in natural rhythms in the body, if you choose the first
day of taking the decoction as your birth tithi (lunar phase at birth),
the effectiveness may increase. Moon has intimate connection with bio-
rhythms in women! In every lunar month, when the phase of the moon
coincides with the phase at which she was born, the chances of
menstruation/conception peak. While Indian acharyas recognized the role of moon
in the process of conception, now western researchers also believe it, e.g. see
Lunaception: A Feminine Odyssey into Fertility and Contraception by Louise
Lacey.

And south indians make a special chart based on date and time of first appearnce
of menses!

Dr Bhate