I had always thought that the options for breastfeeding an adoptive infant were to hire wet nurses or retrieve breast milk from milk banks (otherwise adoptive infants were fed by baby formula). It hadn't even crossed my mind that in some circumstances, adoptive mothers were capable of inducing lactation by breast-pumping.
Obviously, emphasis on the "some" as I know not all women are not capable of inducing lactation in order to produce breast milk. However, must a woman had previously given birth to a child in order to induce lactation?
Also, when an adoptive mother is able to induce lactation for their adoptive infant, are they able to produce colostrum, the first most nutritious (full of antibodies) secretion from the breast? Or is this only produced when the body is actually preparing to give birth to a baby?
How are they able to induce lactation?