Fig. 2.

Morphometric parameters used for whole-mount analysis. (A) A newborn mammary gland dissected for whole mount analysis. (B) The quantification of the ductal area; the epithelial ducts are outlined in blue, and their respective area is indicated by the abutting blue figures. The red polygon indicates area subtended by the ductal structures (total mammary gland area). (C) The four main structural parameters measured. BE, bifurcating end; BP, branching point; BUD, bud; TE, terminal end. (Scale bars: A, 1 cm; B, 1 mm.)