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Secretion of PGF 2α by luteal stage equine endometrial explants treated with control (media only), 50 nmol/L PIF, 100 nmol/L sPIF, 3.0 μg/mL LPS, 3.0 μg/mL LPS with 50 or 100 nmol/L PIF or 100 nmol/L scrambled PIF (PIFscr). The PGF 2α concentrations were measured (a) 24 h (acute inflammatory period) or (b) 72 h (chronic inflammatory period) after treatment. Values differ from control, **P < 0.01; ***P < 0.001.
