Long story short, I like assigning potential breeding partners as soon as babies are old enough to have gems. I try to keep very neat family trees without incest or generation crossings...
Anyway, one of the female babies I marked grew and was suddenly male the next time I checked on her. I wrote it off as not paying attention, but then it happened again to another female baby. And then a third time (again, female to male), but in another save file.
Has this happened to anyone else?
I was playing in sandbox mode. Both files have since been deleted (it didn't occur to me to keep them argh!)
Key points:
--female babies suddenly become male
--sandbox mode