Mammary glands--a.k.a. breasts--are so important to the survival of the species that biologist Carolus Linnaeus put them front and center in choosing the name mammals for our class of animals long ago. It's true that breasts are specially designed to produce that life-giving fluid: milk! The lactating mother can serve as her infant's sole source of nutrition and immunologic support. After giving birth, physiologic changes cause the mother's breasts to produce milk, but that doesn't mean it's always easy. From start to end, the journey of breastfeeding can have challenges. Join Marie to find out more about how breastfeeding works--and what you can do if you experience difficulties to get back on the right path.