Template:Mouse Mammary Timeline table
From Embryology
| Day | Event |
|---|---|
| E10 | milk line first formed by a slight thickening and stratification of the surface ectoderm. |
| E10.5 | expression of Wnt10b in mammary lines on the trunk between the limbs and in axillary and inguinal streaks. |
| E11.5 | milk line breaks up into individual placodes and the underlying mammary mesenchyme begins to condense. |
| E15.5 | mammary epithelium begins to proliferate at the tip and the primary sprout pushes through the mammary mesenchyme towards the underlying fat pad. |
| E18.5 | elongating duct has now grown into the fat pad and has branched into a small ductal system. Cells of the mammary mesenchyme have formed the nipple, which is made of specialized epidermal cells. |
| Data source[1] Related Images: E10/11 | E11 | E12 | E13 | E14.5 | |
