• Bain, A.M. and Howey, W.P. (1975) Observations on the time of foaling in Thoroughbred mares in Australia. J. Reprod. Fertil., Suppl. 23, 545-546.
  • Byron, C.R., Embertson, R.M., Bernard, W.V., Hance, S.R., Bramlage, L.R. and Hopper, S.A. (2002) Dystocia in a referral hospital setting: approach and results. Equine vet. J. 35, 82-85.
  • Davies Morel, M.C.G., Newcombe, J.R. and Holland, S.J. (2002) Factors affecting gestation length in the Thoroughbred mare. Anim. Reprod. Sci. 74, 175-185.
  • Frazer, G. (2011) Dystocia management. In: Equine Reproduction, 2nd edn., Eds: A.O. McKinnon, E.L. Squires, W.E. Vaala and D.D. Varner, Wiley-Blackwell, Chichester. pp 2479-2496.
  • Frazer, G.S., Perkins, N.R., Blanchard, T.L., Orsini, J. and Threlfall, W.R. (1997) Prevalence of fetal maldispositions in equine referral hospital dystocias. Equine vet. J. 29, 111-116.
  • Ginther, O.J. and Williams, D. (1996) On-the-farm incidence and nature of equine dystocias. J. equine vet. Sci. 6, 159-164.
  • Haluska, G.J. and Wilkins, K. (1989) Predictive utility of pre-partum temperature changes in the mare. Equine vet. J. 21, 116-118.
  • Hintz, H.F., Hintz, R.L., Lein, D.H. and Van Vleck, L.D. (1979) Length of gestation periods in Thoroughbred mares. J. equine Med. Surg. 3, 289-292.
  • Hodge, S.L., Kreider, J.L., Potter, G.D., Harms, P.G. and Fleeger, J.L. (1982) Influence of photoperiod on the pregnant and postpartum mare. Am. J. vet. Res. 43, 1752-1755.
  • Howell, C.E. and Rollins, W.C. (1951) Environmental sources of variation in the gestation length of the horse. J. anim. Sci. 10, 789-796.
  • Marteniuk, J.V., Carleton, C.L., Lloyd, J.W. and Shea, M.E. (1998) Association of sex of fetus, sire, month of conception, or year of foaling with duration of gestation in Standardbred mares. J. Am. vet. med. Ass. 212, 1743-5.
  • Newcombe, J.R. and Nout, Y.S. (1998) Apparent effect of management on the hour of parturition in mares. Vet. Rec. 142, 221-222.
  • Norton, J.L., Dallap, B.L., Johnston, J.K., Palmer, J.E., Sertich, P.L., Boston, R. and Wilkins, P. (2007) Retrospective study of dystocia in mares at a referral hospital. Equine vet. J. 39, 37-41.
  • Roberts, S.J. (1986) Veterinary Obstetrics and Genital Diseases (Theriogenology), David and Charles, North Pomfret. pp 277-286.
  • Rollins, W.C. and Howell, C.E. (1951) Genetic sources of variation in the gestation length of the horse. J. anim. Sci. 10, 797-806.
  • Rophia, R.T., Mathews, R.G., Butterfield, R.M., Moss, F.P. and McFadden, W.J. (1969) The duration of pregnancy in Thoroughbred mares. Vet. Rec. 84, 552-555.
  • Rossdale, P.D. (1993) Clinical view of disturbances in equine foetal maturation. Equine vet. J. 14, 3-7.
  • Rossdale, P.D. and Ricketts, S.W. (1974) The Practice of Equine Stud Medicine, Williams and Wilkins, Baltimore. pp 98-146.
  • Rossdale, P.D. and Short, R.V. (1967) The time of foaling of Thoroughbred mares. J. Reprod. Fertil. 13, 341-343.
  • Uppenborn, W. (1933) Untersuchungen über die Trächtigkeitsdauer der Stuten. Z. Züchf. B. 28, I.
  • Valera, M., Blesa, F., Dos Santos, R. and Molina, A. (2006) Genetic study of gestation length in Andalusian and Arabian mares. Anim. Reprod. Sci. 95, 7596.