As said with all the vast weath of knowledge and experience accumulated by a 19 year old boy.
There is a host of diffrent reasons why a woman may be overweight.
Polycystic ovaries, thryoid conditions make it impossible for those women who suffer to lose weight.
Not a result of being lazy and unmotivated or selfish.
Fair enough, but from my experience (as weak as it is), the most common scenario is as I posted before.