2. Breastfeeding might lower risk for childhood obesity: A couple of years ago, a study broke that proposed breastfeeding leads to better eating habits in preschool aged children. Kids who were bottle-fed — even if they were drinking pumped breast milk — were less able to tell when they were full, so they kept eating. It's more of a behavioral link, scientists believe, than a nutritional one.
3. Breast milk needs water: Women who breast feed are more thirsty than normal, and the USDA recommends that they drink one glass of water for every breastfeeding session.
4. Breast milk glands grow during the second trimester: Your breasts get ready to produce milk during the second trimester when sac-like glands grow, thanks to an increase in estrogen, lactogen, and other hormones. Once your baby is born and starts suckling, prolactin is activated, which then spurs on another hormone called oxytocin, which actually releases milk.
5. Breast milk can't be duplicated: Breast milk is always changing, and it can't be duplicated. No two mothers have the same breast milk, and breast milk taken from one woman during one part of the day won't even be the same as a sample taken from the same woman later in the day.