When does milk come in breast for 1st time in Humans? and since when it remains coming there?

normally its when you are about 4-6 months pregnant the ducts will send messages to other part of the body to start producing breast milk you will have alot of seepage coming through both breasts when it comes to full spectrum and starts producing breast milk and it keeps coming in till you no longer need it or want it some put it in bottles everyday so they will have it to give baby