Pregnancy giving only boys

[Tazok]

Hello !

I don't know why, but all pregnancy leads only to the birth of boys. 

I even went to config.xml and change " ChanceOfGirl " to 100% instead of 50%. And it didn't worked. I tried the other way around, and change it to 0% : still only boys
I also changed the pregnancy period to a shorter period to check these changes with freshly impregnated girls, but it changed nothing).

[Drugas]

What else did you modify? Did you build it yourself?
I don't see anything in the most recent code that accounts for this.