Women who are obese tend to become emotional eaters. This is a side effect of the depression that they are subject to. They feel low all the time and feel that will feel better if they stuff themselves with chocolates and other fattening things. This is how they put on more weight.
For women, it is important to follow a healthy weight loss program rather than going for crash dieting and over exercise. Crash dieting and over exercise leads to a lot of other health problems. Moreover, you will gain back the weight you lose once you stop this process. You will not be able to continue starving for a long time because you will go weak and become fatigued. So doctors always emphasize on healthy weight loss for women.