the little dot doesnt say much...
ur looking for an opening in between the book lungs...a male will have no opening.(this can apear to be "the little dot" people speak of, but really thats no way to tell) u can tell if u hold it like in the pic and slightly bend her backwards....the opening will be more visible then.
what makes me say it looks female is that the book lungs are spaced apart fairly wide... males are pretty close togetherhope this helps...pics when possibel