Skip to main content
. Author manuscript; available in PMC: 2015 Feb 1.
Published in final edited form as: Dev Biol. 2013 Dec 18;386(1):1–11. doi: 10.1016/j.ydbio.2013.12.014

Figure 1. Timeline of mouse external genital development.

Figure 1

Cartoons represent a view from the ventral side of the mouse external genitalia during embryonic development. Beginning at E10.5, paired genital swellings (GS) appear. By E12.5, genital swellings have fused to form the genital tubercle (GT). Outgrowth of the GT continues through E14.5 and bilateral preputial swellings (PS) have also appeared. By E16.5, the preputial swellings have fused at the ventral midline to form a continuous prepuce (P) that surrounds the GT.