The expansion of a mammary stem cell population by cell division. Mammary stem cells are a source of cells for growth of the mammary gland during puberty and gestation. These cells can give rise to both the luminal and myoepithelial cell types of the gland, and can regenerate the entire organ.
mesenchymal cell differentiation involved in mammary gland development
mesenchymal cell proliferation +
muscle cell proliferation +
myoblast proliferation +
negative regulation of cell population proliferation +
neural precursor cell proliferation +
nipple development +
osteoblast proliferation +
positive regulation of cell population proliferation +