Can i give my two cents worth on this issue?
i heard uma went straight to work out after she gave birth for this film??
well anyway i am a mom of a 7 month old baby boy-- and in my 2nd month of post partum, i had lost ALL my pregnancy weight, and by my 5th month, i even shed more pounds! so now i am thinner than my pre pregnancy weight--
how did i do it>? i breastfed my baby!

and eating the right foods (controlled)--> veggies, a little carbo, protein. no Fried stuff, no oily stuff, and no sweets-- except maybe once a week. and NOT binging on sweets either. no no to soda and junk food. no chips.
i havent even worked out too!
pre pregnancy, i used to work out, so after i gave birth, in two months, my stomach was flat again- washboard flat. i have NOT yet worked out after i gave birth coz im too busy with work and my son, but ihave really lost more weight than before.
i am 5'9" and weight 110 now. i used to be 120 lbs before i got pregnant!
hope that helps!! breastfeeding realllly helps-- but oh, you know what though, when you stop breastfeeding, your boobs SHRINK! (not that i wanna discourage anyone, but heads up girls, they do!!) so maybe thats why i weigh less haha. i used to have size 36B. now im down to 34B.. boohoo!
