Growth curve of endometriotic and endometrial stromal cells. Endometriotic and endometrial stromal cells were plated in DMEM complete, and total cell counts were determined after 24, 48, 72, and 96 hours of culture. (open circle, PSL, n = 3) peritoneal surface lesion; (diamond, DIL, n = 3) deeply infiltrating lesion; (filled circle, Eoma, n = 3) ovarian endometrioma; (open square, EME, n = 3) endometrium from women with endometriosis; (filled square, EM, n = 4) endometrium.