The milk production process begins early in pregnancy, according to The University of Maryland Medical Center. However, milk generally does not appear until after the birth of the baby.
According to New Health Guide, women often experience tender and swollen breasts soon after conception as their hormones change. Not only are breast changes one of the first signs of pregnancy, but they are also the first step in milk production. At some time from the second trimester to right after birth, many women leak colostrum. This is the first food the breasts produce, according to Babies Online. Generally, women can expect to produce regular white breast milk after giving birth.