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. Author manuscript; available in PMC: 2015 Jan 27.
Published in final edited form as: Prostate. 2013 Aug 30;73(16):1761–1775. doi: 10.1002/pros.22713

Figure 1.

Figure 1

Histology of un-implanted human fetal prostate tissue. Prostate tissues at 15, 19, and 22 weeks demonstrate the normal growth and progression of the stromal and epithelial compartments. Epithelial tissue originates as a mass of cells at gestational week 15, which forms solid buds encompassed by smooth muscle and connective tissue by 19 weeks gestation. These solid buds further mature and canalize in a proximal to distal manner by gestational week 22, a process that continues throughout fetal prostate development. Asterisk (*) shows a well-developed duct with lumen. Hematoxylin and Eosin staining; scale bar 100 μm.