Probe:	m17HSD/KSR7 cDNA
Probe preparation:	Antisense labelled with S35 RNA
Visualized with:	Autoradiography

Structure	Level	Pattern	Image	Note
TS28: corpus luteum	Strong		1A

Structure	Level	Pattern	Image	Note
TS28: corpus luteum	Very strong		1D

Structure	Level	Pattern	Image	Note
TS28: corpus luteum	Very strong		1E

Structure	Level	Pattern	Image	Note
TS28: corpus luteum	Present		1G	Reduced expression, or occasionally missing (data not shown).

Structure	Level	Pattern	Image	Note
TS28: corpus luteum	Strong	Regionally restricted	1I	Only some corpus lutea (active corpus luteum) were positive.

Structure	Level	Pattern	Image	Note
TS28: corpus luteum	Strong	Regionally restricted	1J	Only some corpus lutea (active corpus luteum) were positive.

Structure	Level	Pattern	Image	Note
TS28: corpus luteum	Very strong	Regionally restricted	1K	Only some corpus lutea (active corpus luteum) were positive.

Structure	Level	Pattern	Image	Note
TS28: corpus luteum	Very strong		1L	Expressed in all large corpus lutea. No expression in a few small ones whose luteolysis and involution had further progressed (not shown).

Structure	Level	Pattern	Image	Note
TS28: decidua	Present	Regionally restricted	2A	Expressed in the stromal cells surrounding the implantation site, on the antimesometrial side. Expressed in the inner zone of decidualization.

Structure	Level	Pattern	Image	Note
TS28: decidua	Strong	Regionally restricted	2D	Expressed in the stromal cells surrounding the implantation site, on the antimesometrial side. High expression in the inner zone and low expression in the outer zone of decidualization.

Structure	Level	Pattern	Image	Note
TS28: decidua	Weak	Regionally restricted	2F	Low expression in the outer zone of the decidual reaction. No expression in the stromal edema.

Structure	Level	Pattern	Image	Note
TS28: decidua capsularis	Present		2H
TS28: decidua	Present	Regionally restricted	2H	Expressed in the mesometrial decidual layer.

Structure	Level	Pattern	Image	Note
TS12: trophoblast giant cell	Absent		2H

Structure	Level	Pattern	Image	Note
TS28: decidua capsularis	Strong		2J	Expression was particularly high. No expression in the mesometrial decidual layer at E9 (not shown).

Structure	Level	Pattern	Image	Note
TS15: trophoblast giant cell	Absent		2J

Structure	Level	Pattern	Image	Note
TS14: chorioallantoic placenta	Present	Regionally restricted	3B	Expressed in the spongy or basal layer.
TS14: spongiotrophoblast	Present		3B	Limited to the spongiotrophoblast layer of the junctional zone.
TS14: trophoblast giant cell	Absent		3B

Structure	Level	Pattern	Image	Note
TS20: spongiotrophoblast	Present		3C
TS20: trophoblast giant cell	Absent		3C

Structure	Level	Pattern	Image	Note
TS22: junctional zone	Strong	Regionally restricted	3E	Expressed in spongiotrophoblasts at the junctional zone and in the spongiotrophoblast pegs within the labyrinth region.
TS22: labyrinthine zone	Strong	Regionally restricted	3E	Expressed in spongiotrophoblasts at the junctional zone and in the spongiotrophoblast pegs within the labyrinth region.
TS22: spongiotrophoblast	Strong	Regionally restricted	3E	Expressed in spongiotrophoblasts at the junctional zone and in the spongiotrophoblast pegs within the labyrinth region.

Structure	Level	Pattern	Image	Note
TS25: spongiotrophoblast	Strong	Regionally restricted	3I	Expressed in abundant spongiotrophoblasts in the peripheral region, and the region of spongiotrophoblasts that narrowed to a few cell layers between the decidual and labyrinth zones.

Structure	Level	Pattern	Image	Note
TS26: labyrinthine zone	Present		3K	Decreased (arrowheads) remarkably from that on E17.5.

Structure	Level	Pattern	Image	Note
TS28: corpus luteum	Strong
TS28: uterus	Absent

Structure	Level	Pattern	Image	Note
TS28: uterus	Absent

Structure	Level	Pattern	Image	Note
TS28: myometrium	Absent
TS28: uterine gland	Absent

Structure	Level	Pattern	Image	Note
TS28: decidua	Absent			After E9.5, expression gradually disappeared and could no longer be detected in the remnants of the deteriorating antimesometrial decidual layer on E12.5.