the catecholamine contents of the ampullary ( a ) and isthmic ( i ) regions of sow oviducts during proestrus ( p ) , estrus ( e ) and metestrus ( m ) proved to be quite different and differently affected by the variations of the sex cycle : ne , da and epinephrine ( epi ) in ( i ) higher than in ( a ) ;
C0007412
catecholamine
C0028351
ne