I think that individuals are not set to have a particular gender in certain months, even if you've had boys or girls in those months before. I DO think there is a mild trend for ALL people to be a small amount more boy friendly in the N Hemi with conceptions in Sept-Nov, and girl friendly in the months Mar-May (reversed for S Hemi). But this is not a set in stone thing, it's a gradual peak that slowly increases, and I believe Feb. to also be more girl friendly because it's coming into the peak. I would hate to see anyone postpone swaying simply because they'd had a baby of a certain gender in a a particular month.
It's totally possible to get boys in the girl peak and vice versa, but over the whole population there is a def. statistical difference between the numbers of boys and girls conceived in those months that seems to stay consistent year in and year out. It something that may help a bit. But it's no magic bullet and if it isn't convenient for your family to TTC in those months, then DON't. you can get a boy or a girl in any month, no matter what.
I got 2 of my boys in the "girl peak" and my girl in the "boy peak". That DOES NOT mean that I am "immune to seasons" or that I am "the opposite" of normal. It just means that even tho I was just as affected by the seasons as we all are, I had so much in my life swaying the other way that I was able to still conceive a baby of the opposite gender those months. (plus LUCK)
