Abstract
Oxytocin-induced luteolysis in goats was associated with significant increases in peripheral plasma concentrations of 13,14-dihydro-15-keto-prostaglandin F
2α (PGFM). Oral administration of the prostaglandin (PG) synthetase inhibitor meclofenamic acid (lg/day) prevented both the luteolytic action of oxytocin and the increase in PGFM concentrations. These results confirm that the luteolytic effect of oxytocin is mediated via the production and release of PGF
2α.