Add a grande latte to that, at 230 calories, and you have already pretty much busted any calorie-deficit acquired through breastfeeding. For one thing, breastfeeding is widely regarded as a licence to eat cake a generous slice of carrot cake with cream cheese frosting contains about 650 calories even a skinny blueberry muffin from Starbucks contains 268 calories. In theory, then, for every week a woman breastfeeds she should be able to lose about half a kilogram, getting back to her pre-pregnancy weight within two months.īut, as many mothers will testify, it is rarely this simple. Exclusive breastfeeding eats up about 595 calories a day during the first two months of a baby’s life, increasing to 695 calories a day as the baby gets bigger. On average, women lay down 4kg (9lb) of fat during pregnancy and to lose each kilogram, they will need to create a 7,700-calorie deficit.