Well - honestly.
How many times do we hear that the moon governs the female 'cycle' ?
Yet when I was a kid in a house with 3 women in it we all 'came on' at different times of the month - and now I'm in a house with 2 women and the same goes.
If it were true then 'all' women would become fertile at roughly the same time each month and I guess there would be a 'peak' time of a month when most babies are born....
True...or Fiction ?