Originally Posted by
atomic sagebrush
Central PA is Northern Hemisphere, so the girl peak months are Mar, Apr, May, and prob. a bit in Feb and June (I think Feb is more "girl" than June but don't have data to back that up just yet.) We don't think it has to do with the weather per se but day length and ~possibly~ if you're exposed to cooler temps than you had been (if temps had been warm for several months and then got colder suddenly)
Please have nothing to do with the Chinese Gender Chart, it's completely phony and a waste of time. If the Chinese were privy to some ancient secret about gender selection they would not have orphanages full of unwanted little girls.