This is an easy one to use as well....here are instructions:
1. click this link:
Biorhythm Chart Form
2. where it says 'create a biochart' there are some boxes to fill in underneath
in the first box name: obviously your name but its not important
in the second box birth date: select YOUR birth date
in the third box chart date: select the month and year you concieved or ovulated
in the fourth box Lunar cycles: select your timezone! for the UK it's GMT: 00:00 not sure what it would be for other countries?
3. click the button that says bio chart and a weird chart appears with green red and blue lines.
IGNORE the green lines.
If on the day of conception:
the blue line is in the top half and red is in the bottom half it predicts BOY
if blue and red lines are both in the top half it sways towards BOY
if blue and red lines are in the bottom half it sways towards GIRL
and if the red line is in the top half and the blue line is in the bottom half it predicts GIRL
also you see little moon shapes. apparently this bit isn't *as* accurate but still predicts gender.
white moon = predicts boy
grey moon = predicts girl
Or I used this one as well:
Moon Phase Calculator - Moon Sign Calendar