Probe:	H2AZ probe1
Probe preparation:	labelled with digoxigenin

Structure	Level	Pattern	Image	Note
TS13: chorion	Present	Regionally restricted	1A	Expression in ectoplacental cone and chorionic regions of immature placenta, which contain progenitor cells for spongiotrophoblast and labyrinth placental zones respectively.
TS13: ectoplacental cone	Present	Regionally restricted	1A	Expression in ectoplacental cone and chorionic regions of immature placenta, which contain progenitor cells for spongiotrophoblast and labyrinth placental zones respectively.

Structure	Level	Pattern	Image	Note
TS15: labyrinthine zone	Present	Regionally restricted	1B	Expression increasingly restricted to smaller clusters of cells in labyrinth and spongiotrophoblast zones, likely pools of progenitor cells (lacking morphological characteristics of terminally differentiated trophoblast).
TS15: spongiotrophoblast	Present	Regionally restricted	1B	Expression increasingly restricted to smaller clusters of cells in labyrinth and spongiotrophoblast zones, likely pools of progenitor cells (lacking morphological characteristics of terminally differentiated trophoblast).

Structure	Level	Pattern	Image	Note
TS17: labyrinthine zone	Present	Regionally restricted	1C	Expression increasingly restricted to smaller clusters of cells in labyrinth and spongiotrophoblast zones, likely pools of progenitor cells (lacking morphological characteristics of terminally differentiated trophoblast).
TS17: spongiotrophoblast	Present	Regionally restricted	1C	Expression increasingly restricted to smaller clusters of cells in labyrinth and spongiotrophoblast zones, likely pools of progenitor cells (lacking morphological characteristics of terminally differentiated trophoblast).

Structure	Level	Pattern	Image	Note
TS20: labyrinthine zone	Present	Regionally restricted	1D	Expression increasingly restricted to smaller clusters of cells in labyrinth and spongiotrophoblast zones, likely pools of progenitor cells (lacking morphological characteristics of terminally differentiated trophoblast).
TS20: spongiotrophoblast	Present	Regionally restricted	1D	Expression increasingly restricted to smaller clusters of cells in labyrinth and spongiotrophoblast zones, likely pools of progenitor cells (lacking morphological characteristics of terminally differentiated trophoblast).

Structure	Level	Pattern	Image	Note
TS22: labyrinthine zone	Weak	Regionally restricted	1E	Expression increasingly restricted to smaller clusters of cells in labyrinth and spongiotrophoblast zones, likely pools of progenitor cells (lacking morphological characteristics of terminally differentiated trophoblast).
TS22: spongiotrophoblast	Weak	Regionally restricted	1E	Expression increasingly restricted to smaller clusters of cells in labyrinth and spongiotrophoblast zones, likely pools of progenitor cells (lacking morphological characteristics of terminally differentiated trophoblast).

Structure	Level	Pattern	Image	Note
TS24: labyrinthine zone	Absent		1F
TS24: spongiotrophoblast	Absent		1F