when the ewes were injected repeatedly ( 200 ng i.v. , hourly for 5 h ) with [ d-penicillamine- ( but ) 6 ] -gnrh ( 1-9 ) nonapeptide-ethylamide , a synthetic gnrh analogue which does not bind to the antiserum , there was a rapid rise in the secretion of lh in both control and bff-treated animals but , as with the responses to buserelin , the initial response was significantly lower in bff-treated than in control ewes .
C0023610
gnrh
C0006456
buserelin