It is mysterious how a slim women would give birth for a big fatty baby!!! I developed this thesis based on almost all my relatives and friends who came across this issue. The thing is if the women didn't eat during pregnancy time, the baby body wont get enough food. As a natural behaviour, the baby's body will asume that he wont get food in regular base, so he have to store it!!!! At the end, the baby wil gain weight because his mom didn't eat!!!!!!!!!!!

It's true for humans, if you don't provide enough food in a regular base for your body, you will start to gain weight because of your bodyreaction towards the lack of enough food.

Now we can see why a slim guy eat too much and gains no weight while a fat guy eat less and still gaining weight.