Transplantation results from implantation of dispersed, aged-nulliparous and aged-multiparous mammary epithelial cells into mammary fat pads of 3-wk old female mice.

<p>Representative whole-mounts of FVB/N-RC cleared fat pads transplanted with 250 (panel a and b) or 100 cells (panel c and d), collected from aged-nulliparous (panel a and c) and aged-multiparous (panel b and d), showing outgrowth filling of the fat pad. There was no difference in the results obtained with tissues from aged versus young donors regardless of parity.