Effect Of parenteral Administration Of Some Drugs (Diethylstilboestrol And Disodium Methylarsinate) On Milk yield And Constituents Of Friesian Cows

In thi3 work, cn.angE.s in rm.Lk yi6.1d arid compo6nts wE.r6 invE.stige.tE.d in 15 FriEsian (Jo’wo, s ac h of about 4-6YS aJ:’S old, 435.6 kg. b. -1Nl- and in the sE.cond s6ason of lsctat ion. ’I’hE.Y wE.rE. gro up E. d into 3 6 qual gro up s. -rhe first IvIorE.OvE.r~ t he ChEtngE.S in ’milk .,fiE-Id and milk comp o ne n t s ( Fc=tJL;, C\hloridlS, Lact oss, ?rotein, cassin, total solids and solids no t :[a1; ) psrcE-ntag6s wer6 Lnve e+ t Lga t e d OVE.r a p e r-Lo d of 21 day s prio·r during and aftsradministrstion of thE. studisd drugs. ThE. Q b t ainE. 9 r-e sl.llt s indicats d that r-e p e a t e d intramusculsx inj6ct5.on of aiGtt..ylstilbo6strol signifi- c&ntly dE-crE-asE-d thE, milk yisld of ,Frif.8ian CDWS by 26 •. 52%