Table II. Spatial distribution of HSCs within the E12 UGR.

Tissue	No. of mice repopulated/total transplanteda
Gonads	1/10
Mesonephroi	4/11
Metanephroi	1/2b
UGRc	3/7
Aortad	9/11
AGMc	5/6

^aTransplanted mice received 1–2 e.e. of subdissected tissue. Only mice with ≥10% donor repopulation in the peripheral blood at 4–5 months after transfer were included as positive. Data are from a total of two independent experiments.

^bFive embryo equivalents transplanted per mouse.

^cNeither UGR nor AGM include metanephroi.

^dAorta region: includes surrounding mesenchyme.