This maybe umm idk not the correct answer. Idk. The first and most important ,uh , things a baby needs out of a mother's breast milk the baby needs are the , first few omg, how do I say this?? From 1996?? All the first, that comes out, in the first few hours etc... and weeks. Is what I was told! Please don't hold me to it! My Dr. Told me as long as I pumped for at least 6 to 8 weeks for the baby, he ( my son) would get all the good stuff , basically he needed. I know, I know! Not medical. Sorry he is 26.