Table 2.

Summary of human endometrial stromal cell studies included.

Author, year	Sample size (fertility)	Cycle stage	Relevant results
Gililland et al., 1992 (47)	n = 7 (fertile)	Endometrial tissue (P n = 2; ES n = 3, LS n = 2)	Specific high affinity ANP-R were identified in endometrial tissue, and may regulate cell function or development via cGMP
Schumann et al., 2015 (48)	Decidua, n = 4; Endometrial tissue: n = 6 (fertile)	Decidua (7–9 weeks pregnant); Endometrial tissue (P n = 3, S n = 3)	Claudin-3 and -10 were identified in the endometrial epithelium but not early pregnancy decidua, and claudin-3 in extravillous trophoblast
Murakami et al., 2014 (49)	n = 43 (unknown)	Endometrial tissue (6–10 days post-LH surge)	SUSD2 expression alters with cell-cell contact and Notch signalling, and thus alters the perivascular secretome upon decidualization
Szwarc et al., 2018 (50)	Unknown (unknown)	Endometrial tissue (all P)	A subset of stromal cell genes regulated by PGR during decidualization also requires SRC-2, for example retinoid signaling

P, proliferative; ES, early-secretory; LS, late-secretory; S, secretory; LH, luteinizing hormone; ANP-R, atrial naturetic peptide-receptors; cGMP, cyclic guanosine monophosphate; SUSD2, sushi domain containing 2; PGR, progesterone receptor; SRC-2, steroid receptor coactivator-2.