label: genital tubercle
label_lc: genital tubercle
description: "The genital tubercle (GT) is a medial swelling seen at the level of the hind limb buds, adjacent to the cloaca and posterior/caudal to the urogenital sinus (UGS). At TS:19 the genital tubercle can be subdivided into a dorsal genital swelling and two ventrolateral genital swellings, which have merged into a single genital tubercle. At TS:19, is comprised of urethral plate epithelium and surface ectoderm of genital tubercle. The urethral plate epithelium and surface ectoderm together are known as the cloacal membrane. Derives from the TS:17-TS:18 genital swelling. From TS:20, the genital tubercle becomes genital tubercle of male/female."