According to the Jonas conception method:
1. Ovulation occurs when the distance between the Sun and Moon is the same as it was at the time of a woman's birth. For instance, if the woman was born at the time of the Full Moon, when the Moon makes an angle of 180° with the Sun, the time of fertility during her adulthood will be whenever the Moon is full, and this independently of her menstrual cycle.
2. The gender of the child is determined by the sign the Moon occupies at the time of conception. (Although the exact time of conception is elusive but easy to influence)
3. Unfavorable gravitational forces of certain celestial bodies at the time of conception can produce complications during pregnancy, specifically in the fetus. (and dates can be chosen to avoid these influences)
This is neat for several reasons...
First, it potentially means 12 to 13 more chances per year to conceive. That being in addition to your hormomal cycle's fertile periods.
Second, these times happen on a schedule. Easy planning, no guessing. O+12 becomes simple addition.
Third, one more sway to add to your gender cocktail. And of course who doesn't like a free and natural approach?
My cousin and two friends have concieved using this method so I know it works for some people. ( I won't be TTC until 2010 because of adoption and an impending relocation)
And because I don't really want to go into a long explaination about how to calculate a Sun Moon midpoint; if you'd like to try it, I'll do it for you. Free. For a decade in advance if you'd like.
It's quick and easy with my handy dandy astronomy program. In the interest of researching the effectivness of the method, I'd just like to know if it worked for you.
I'll work up some info and post as an example.