Table 2.

Published images of human prostatic bud elongation, ductal branching, ductal canalization and secretory cytodifferentiation.

Specimen Age  (weeks)	Analysis/focus of paper	Reference
32, 38 & 40	Histology	(Zondek and Zondek, 1979)
28 & 30	Histology	(Xia et al., 1990)
22 & 28	Keratin IHC	(Wernert et al., 1987)
8–25	Neuroendocrine cell differentiation	(Xue et al., 2000; Szczyrba et al., 2017)
12, 16, 28, 29, 39	Sonic & desert hedgehog	(Zhu et al., 2007)
18, 19 & 23	Estrogen receptor beta (ESR2)	(Adams et al., 2002)
13 & 25	Striated & smooth muscle histochemistry	(Sebe et al., 2005)
19, 21 & 22	Estrogen receptor alpha & beta (ESR1 & 2)	(Shapiro et al., 2005a; Shapiro et al., 2005b)
19 to 36	Androgen receptor	(Aumuller et al., 1998)
9–16	Sonic hedgehog	(Barnett et al., 2002)
19–22	5a-reductase immunohistochemistry	(Radmayr et al., 2008; Levine et al., 1996; Lunacek et al., 2007; Bonkhoff et al., 1996)
18–23	SOX9 immunohistochemistry	(Wang et al., 2008)