Typically, at birth a mother loses weight in water, the placenta and the baby. If your baby weighs 8lbs, then you've already lost 8lbs at birth. Typically, about 13 lbs total is lost at birth. This includes the baby, the placenta and water weight. It is also normal to lose water weight days and weeks after birth. Night sweats are common for postpartum mamas that help flush the extra water out. Easy Weight Loss, Weight Gain, Lose Water Weight, Healthy Milk, Smoothie Challenge, Lean Muscle Mass, Post Partum Workout, Night Sweats, Pregnancy Birth