Table 1.

Distribution of Ki67-positive cells during adrenal gland development

Age	Main location of Ki67-positive cells in cortex	Frequency of Ki67-positive cells (subjective score)
Outer cortex	Inner cortex	Medulla
E18.5	1–3 subcapsular cell layers*	+++	+	+++
P1	2–3 subcapsular cell layers (ZG)	+++	+	+++
P3	2–3 subcapsular cell layers (ZG)	+++	+	+++
P10	ZG + outer half of ZF	++++	+	+++
Adult (8 weeks)	ZG + outer third of ZF	++	+	++

^*The subcapsular region is the most peripheral part of the outer cortex (three cell layers closest to capsule).