Douglas R H (2004). Endocrine Diagnostics in the Broodmare: What you need to know about Progestins and Estrogens. Published in the, Proceedings of the Society of Theriogenology 2004.
Douglas R H (2000). Circadian cortisol rhythmicity and equine Cushing’s-like disease. J. Eq. Vet. Sci. 19-684-686.
Simon A. Staempfli, Sarah Clavier, Don L. Thompson, Patrick J. Burns, Sara K. Lyle, Angus O. McKinnon (2011). Effect of a Single Injection of Long-acting Progesterone on the First Ovulation in Early and Late Spring Transitional Mares. Journal of Equine Veterinary Science. 31: 744-748
T. Raz, S. Carley, C. Card (2009). Comparison of the effects of eFSH and deslorelin treatment regimes on ovarian stimulation and embryo production of donor mares in early vernal transition. Theriogenology 71: 1358-1366,
Burns P J and Douglas R H (1981). Reproductive hormone concentrations in stallions with breeding problems : Case studies. Eq. Vet. Sci. 5: 40-42.
Burns P J and Douglas R H (1981). Effects of daily administration of estradiol-17B on follicular growth, ovulation and plasma hormones in mares, Biol. Reprod. 24:1026-1031.
Loy R G, Pemstein R, O’Canna D and Douglas R H (1981). Control of ovulation in cycling mares with ovarian steroids and prostaglandin. Theriogenology 15:191-200.
Holtan D W, Douglas R H and Ginther O J (1977). Estrus, ovulation and conception following synchronization with progesterone, prostaglandin F2a and human chorionic gonadotropin in pony mares. J. Anim. Sci. 44:431-437.
Douglas R H and Umphenour N (1992). Endocrine Abnormalities and Hormonal Therapy – ScienceDirect. Vet. Clin. NA. Equine Practice. Stallion Management. 5:237-249.
Ginther O J, Douglas R H and Woods G L (1982). A biological embryo-reduction mechanism for the elimination of excess embryos in mares – PubMed (nih.gov). Theriogenology 18:475-485.
Melrose P A, Walker R F and Douglas R H. (1990). Dopamine in the cerebrospinal fluid of prepubertal and adult horses – PubMed (nih.gov). Brain Behav. Evol. 35:98-106.
Melrose P A and Douglas R H ( 1982). Seasonal changes in third ventricular morphology of long-term ovariectomized horse mares. J. Anim. Sci. 55 (Suppl. 1):Abstract 624.
Melrose P A and Douglas R H (1982). Electron microscopy of the ventricular lining associated with the hypothalamus and median eminence of prepubertal female horses – PubMed (nih.gov). J. Reprod. Fert. , Suppl. 32:577-581.
Melrose P A and Douglas R H (1982). Seasonal and cyclic changes in the morphology of the equine third ventricular lining. J. Anim. Sci. 53 (Suppl 1): Abstract 546.
Melrose P and Douglas R H (1981). Estrogen-Sensitive Morphological Plasticity in the Third Ventricle of Seasonally Anovulatory Mares | Biology of Reproduction | Oxford Academic (oup.com). Biol. Reprod. 24:945-954.
Ginther O J, Douglas R H and Lawrence J R (1982). Twinning in mares: A survey of veterinarians and analyses of theriogenology records – ScienceDirect. Theriogenology 18:333-347.
Ginther O J and Douglas R H (1982). The outcome of twin pregnancies in mares – PubMed (nih.gov). Theriogenology 18: 237-244.
Fay J E and Douglas R H (1987). Changes in thecal and granulosa cell LH and FSH receptor content associated with follicular fluid and peripheral plasma gonadotrophin and steroid hormone concentrations in preovulatory follicles of mares – PubMed (nih.gov). J. Reprod. Fert.
Fay J E and Douglas R H (1982). The use of radioreceptor assay for the detection of pregnancy in the mare – ScienceDirect. Theriogenology 18:431-444.
Burns P J, Kumaresan and Douglas R H (1981). Plasma oxytocin concentrations in cyclic mares and sexually aroused stallions. Theriogenology. 16: 531-539.
Burns P J ,et al and Douglas R H (1981) . Effects of season age, and increased photoperiod on reproductive hormone concentrations and testicular diameters in thoroughbred stallions. Eq. Vet Sci. 4: 202-208.
Burns P J and Douglas R H (1981). Effects of a single injection of GnRH or equine pituitary extract on plasma LH and FSH concentrations in stallions. Eq. Vet. Sci. 4:281-283.
Douglas R H (1982). Some aspects of equine embryo transfer. J. Reprod. Fert. Suppl. 32:405-408.
Douglas R H and Ginther O J (1976). Effects of repeated daily injections of prostaglandin F2a on ovaries in mares. Prostaglandins 12:881-894.
Douglas R H, Del Campo M R, and Ginther O J.(1976). Luteolysis following carotid or ovarian arterial injection of prostaglandin F2a in mares. Biol. Reprod. 14:473-477.
Douglas R H (1979) . Review of induction of superovulation and embryo transfer in the equine. Theriogenology 11:33-46.
Douglas R H (1976). Progesterone and estradiol in cerebrospinal fluid. J. Anim. Sci. 43: Abstract 277
Bailey V E and Douglas R H. (1977). Induction of ovulation in seasonally-anovulatory mares with GnRh. Ann. Meet. Amer. Soc. Anim. Sci. , Madison, Wisconsin. Abstract 336.
Allen R G and Douglas R H (1978). Luteinizing hormone levels in the cerebrospinal fluid of mares: reflection of ovarian status. Ann. Meet. Amer. Soc. Anim. Sci. East Lansing, Michigan.
Woodley S L , Burns P J, Douglas R H and Oxender W D(1979). Prolonged interovulatory interval after oestradiol treatment in mares. J. Reprod. Fert. , Suppl. 27:205-209.
Squires E L, Douglas R H, Steffenhagen W P and Ginther O J (1974). Ovarian changes during estrous cycle and pregnancy in mares. J. Anim. Sci. 38:330-338.
Holtan D W, Douglas R H and Ginther O J (1974). Ovulation control in mares with progesterone or PGF2a. J. Anim. Sci. 39:211.
Hershman L and Douglas R H (1979). The critical period for the maternal recognition of pregnancy in pony mares. J. Reprod. Fert. , Suppl. 27:395-401.
Douglas R H and Ginther O J (1976). Concentrations of prostaglandin F in uterine venous plasma of anesthetized mares during the estrous cycle and early pregnancy. Prostaglandins 11:251-260.
Douglas R H and Ginther O J (1975). Development of the equine fetus and placenta. J. Reprod. Fert. , Suppl. 23:503-505
Douglas R H , Nuti L and Ginther O J (1974). Induction of ovulation and multiple ovulation in seasonally-anovulatory mares with equine pituitary fractions. Theriogenology 2:133-142.
Douglas R H and Ginther O J(1973). Effect of prostaglandin F2a in ewes and pony mares. J. Anim. Sci. 37:308.
Douglas R H , Squires E L and Ginther O J (1974). Induction of abortion in mares with prostaglandin F2a. J. Ani. Sci. 39:404-407.
Douglas R H and Ginther O J (1975). Effects of prostaglandin F2a on estrous cycle or corpus luteum in mares and gilts. J. Ani. Sci. 40:518-522.
Douglas R H and Ginther O J(1975). Route of prostaglandin F2a injection and luteolysis in mares. Proc. Soc. Exp. Biol. Med. 148:263-269.
Douglas R H and Ginther O J (1973). Luteolysis following a single injection of prostaglandin F2a in sheep. J Animal Sci. 37: 990-993.
Douglas R H and Ginther O J (1972) . Effect of prostaglandin F2a on length of diestrus in mares. Prostaglandins.2: 265-268.