each gilt was treated with four pge : pgf infusion sequences ( seq ) in each uterine horn : phosphate-buffered saline ( pbs ; pbs-seq ) , pge1 ( 50 micrograms ) , pge2 ( 50 micrograms ) , and pge1 ( 25 micrograms ) + pge2 ( 25 micrograms ) ( pge-seq ) , with each infusion followed 15 min later by pgf ( 25 micrograms ) .
C0012472
pge2
C0033559
pge