2Dhobie R L,Gupta S K. Prestaglandin F2α and analogue in management of postpartum Suboesrus in cows[J]. Animal Breeding Abstract,1987,55(11):6820.
3Cavestany D,Foote R H. Postagladin F2α induced estrus in open cows and presumed abortion in pregnant cows which unobserved oestrus in a hred monitored by milk progesterone assay[J]. Cornell Veterinarian,1985,75(3):393-397.
4Armstrong D T, Pfitzner A P, Warnes G M,et al. Endocrine responses of goats after induction of superovulation with PMSG and FSH[J]. J Reprod Fert,1983,67:395-401.
