The team at EquiBreed NZ is involved in ongoing research projects from equine reproduction to stem cell therapy. Our cutting edge research is designed to increase, improve and optimise the options for our breeders to produce their next beautiful foal. We undertake research as part of our due diligence to ensure we offer the best services, procedures and treatments available in the world for our breeders. Our research program reflects the global challenges of breeding horses in the 21st century. We love challenges, we love research and we love helping our breeders breed beautiful horses.


2017 – 2020

ARC Linkage Project titled ‘Enhancing fertility for the Thoroughbred and Standardbred industries’. In collaboration with University of Newcastle. ARC Ref# LP160100824


MPhil Research Project – University of Waikato.“Evaluation of mesenchymal stem cells for the treatment of lameness in horses. ”Alexandra Leander BVSc. MPhil.


MSc Research Project – University of Waikato.“A comparison of equine Adipose Derived Stem Cells (ADSC), bone marrow stem cells (BMSC) and peripheral blood stem cells (pBSC) for the treatment of lameness conditions in horses.”Amy Redmond Hubbard B. Applied Anim. Tech, Dipl. Applied Science, MSc (Hons).


PhD Research Project – University of Sydney. “Development of media for the sex preselection of stallion spermatozoa. ”Zamira Gibb BSc. PhD.


MSc Research Project – University of Waikato.“Factors affecting the fertility of stallion epididymal spermatozoa”. Cleo Hogne Beattie BSc MSc (Hons)


MSc Research project – University of Waikato. “The effect of dietary anti-oxidants on stallion fertility.” Jody Blomfield BSc MSc (Hons).


PhD Research Project – University of Sydney. “Cryopreservation of sex sorted stallion spermatozoa.” Jennifer ClulowBAgrSci. BVSc. PhD.


MSc Research Project - University of Waikato.“ A comparison of the characteristics of ejaculated and epididymal stallion spermatozoa.” Victoria Weston BSc MSc (Hons).

Publications - PubMed - scientifically peer reviewed:

Morris LH, McCue PM, Aurich C. Equine endometritis: A review of challenges and new approaches.Reproduction. 2020 Aug 1:REP-19-0478.R3. doi: 10.1530/REP-19-0478. Online ahead of print.PMID: 32805710 Review.

Morris LH, Colgan S, Leathwick DM, Nielsen MK. Anthelmintic efficacy of single active and combination products against commonly occurring parasites in foals. Vet Parasitol. 2019.Apr;268:46-52. doi: 10.1016/j.vetpar.2019.02.006. Epub 2019 Mar 1.PMID: 30981305 Clinical Trial. PMID: 31640845

Morris LH, Maclellan LJ. Update on advanced semen-processing technologies and their application for in vitro embryo production in horses.ReprodFertil Dev. 2019 Jan;31(12):1771-1777. doi: 10.1071/RD19301.PMID: 31640845

Morris LHA. The development of in vitro embryo production in the horse. Equine Vet J. 2018 Apr 13. doi: 10.1111/evj.12839. [Epub ahead of print] Review. PubMed PMID: 29654624.

Mariella J, Iacono E, Lanci A, Merlo B, Palermo C, Morris L, Castagnetti C. Macroscopic characteristics of the umbilical cord in Standardbred, Thoroughbred and Warmblood horses. Theriogenology. 2018 Jun;113:166-170. doi: 10.1016/j.theriogenology.2018.03.004. Epub 2018 Mar 7. PubMed PMID: 29547732.

McConaghy FF, Green LA, Colgan S, Morris LH. Studies of the pharmacokinetic profile, in vivo efficacy and safety of injectable altrenogest for the suppression of oestrus in mares.Aust Vet J. 2016 Jul;94(7):248-55. doi:10.1111/avj.12459. PubMed PMID: 27349885.

Gibb Z, Grupen CG, Maxwell WM, Morris LH. Field fertility of liquid stored and cryopreserved flow cytometrically sex-sorted stallion sperm. Equine Vet J. 2017 Mar;49(2):160-166. doi: 10.1111/evj.12583. Epub 2016 May 22. PubMed PMID: 27060979.

Gibb Z, Morris LH, Maxwell WM, Grupen CG. Dimethyl formamide improves the postthaw characteristics of sex-sorted and nonsorted stallion sperm. Theriogenology. 2013 Apr 15;79(7):1027-33. doi: 10.1016/j.theriogenology.2013.01.013. Epub 2013 Mar 1. PubMed PMID: 23453787.

Gibb Z, Butler TJ, Morris LH, Maxwell WM, Grupen CG. Quercetin improves the postthaw characteristics of cryopreserved sex-sorted and nonsorted stallion sperm. Theriogenology. 2013 Apr 1;79(6):1001-9. doi:10.1016/j.theriogenology.2012.06.032. Epub 2013 Feb 26. PubMed PMID: 23453253.

Clulow JR, Buss H, Evans G, Sieme H, Rath D, Morris LH, Maxwell WM. Effect of staining and freezing media on sortability of stallion spermatozoa and their post-thaw viability after sex-sorting and cryopreservation. ReprodDomest Anim. 2012 Feb;47(1):1-7. doi: 10.1111/j.1439-0531.2007.01010.x. Epub 2011 Nov 7.PubMed PMID: 22053724.

Gibb Z, Morris LH, Maxwell WM, Grupen CG. Use of a defined diluent increases the sex-sorting efficiency of stallion sperm. Theriogenology. 2011 Mar 1;75(4):610-9. doi: 10.1016/j.theriogenology.2010.10.001. Epub 2010 Dec 7. PubMed PMID: 21144575.

Clulow JR, Evans G, Maxwell WM, Morris LH. Evaluation of the function of fresh and frozen-thawed sex-sorted and non-sorted stallion spermatozoa using a heterologous oocyte binding assay.ReprodFertil Dev. 2010;22(4):710-7. doi: 10.1071/RD09033. PubMed PMID: 20353730.

Clulow JR, Evans G, Morris LH, Maxwell WM. Factors influencing the "sortability" of stallion spermatozoa into X- and Y-chromosome bearing populations. AnimReprod Sci. 2009 Jul;113(1-4):220-8. doi: 10.1016/j.anireprosci.2008.08.019. Epub 2008 Aug 20. PubMed PMID: 19022595.

Clulow JR, Mansfield LJ, Morris LH, Evans G, Maxwell WM.A comparison between freezing methods for the cryopreservation of stallion spermatozoa.AnimReprod Sci. 2008 Nov;108(3-4):298-308. Epub 2007 Sep 16. PubMed PMID: 18065170.

Clulow JR, Buss H, Sieme H, Rodger JA, Cawdell-Smith AJ, Evans G, Rath D, Morris LH, Maxwell WM. Field fertility of sex-sorted and non-sorted frozen-thawed stallion spermatozoa. AnimReprod Sci. 2008 Nov;108(3-4):287-97. Epub 2007 Sep 16. PubMed PMID: 17977675.

Clulow JR, Maxwell WM, Evans G, Morris LH. A comparison of duck and chicken egg yolk for  cryopreservation of stallion sperm. Aust Vet J. 2007 Jun;85(6):232-5. PubMed PMID: 17547636.

Morris L. Advanced insemination techniques in mares. Vet Clin North Am Equine Pract. 2006 Dec;22(3):693-703. Review. PubMed PMID: 17129797.

Allen WR(1), Wilsher S, Morris L,Crowhurst JS, Hillyer MH, Neal HN. Laparoscopic application of PGE2 to re-establish oviducal patency and fertilityin infertile mares: a preliminary study.Equine Vet J. 2006 Sep;38(5):454-9.

Buss H, Clulow J, Sieme H, Maxwell WM, Morris LH, Sieg B, Struckmann C, Rath D. Improvement of the freezability of sex-sorted stallion spermatozoa. AnimReprod Sci. 2005 Oct;89(1-4):315-8. PubMed PMID: 16265755.

Weston VL, McLeay L, Morris LH. The in vitro response of equine epididymal and ejaculated spermatozoa to caffeine.AnimReprod Sci. 2005 Oct;89(1-4):272-5. PubMed PMID: 16265739.

Morris LH. Challenges facing sex preselection of stallion spermatozoa.AnimReprod Sci. 2005 Oct;89(1-4):147-57. Review. PubMed PMID: 16084041.

Morris LH. Low dose insemination in the mare: an update. AnimReprod Sci. 2004 Jul;82-83:625-32. Review. PubMed PMID: 15271485.

Morris LH, Tiplady C, Allen WR. Pregnancy rates in mares after a single fixed time hysteroscopic insemination of low numbers of frozen-thawed spermatozoa onto the uterotubal junction. Equine Vet J. 2003 Mar;35(2):197-201. PubMed PMID:12638798.

Morris LH, Randall AE, King WA, Johnson WH, Buckrell BC. The contribution of the male to ovine embryogenesis in an in vitro embryo production system.AnimReprod Sci. 2003 Jan 15;75(1-2):9-26. PubMed PMID: 12535581.

Morris LH, Allen WR. An overview of low dose insemination in the mare.ReprodDomest Anim. 2002 Aug;37(4):206-10. Review. PubMed PMID: 12173985.

Li X, Morris LH, Allen WR. In vitro development of horse oocytes reconstructed with the nuclei of fetal and adult cells. BiolReprod. 2002 May;66(5):1288-92. PubMed PMID: 11967189.

Lindsey AC, Morris LH, Allen WR, Schenk JL, Squires EL, Bruemmer JE. Hysteroscopic insemination of mares with low numbers of nonsorted or flow sorted spermatozoa. Equine Vet J. 2002 Mar;34(2):128-32. PubMed PMID: 11905434.

Kochhar HP, Wu B, Morris LH, Buckrell BC, Pollard JW, Basrur PK, King WA. Maturation status, protein synthesis and developmental competence of oocytes derived from lambs and ewes. ReprodDomest Anim. 2002 Feb;37(1):19-25. PubMed PMID: 11882241.

Morris LH, Allen WR. Reproductive efficiency of intensively managed Thoroughbred mares in Newmarket. Equine Vet J. 2002 Jan;34(1):51-60. PubMed PMID: 11822372.

Morris LH, Johnson WH, Leibo SP, Buckrell BC. Relationship between the characteristics of frozen-thawed ram spermatozoa and in vitro embryo production.ReprodFertil Dev. 2001;13(2-3):193-201. PubMed PMID: 11720137.

Li X, Morris LH, Allen WR. Influence of co-culture during maturation on the developmental potential of equine oocytes fertilized by intracytoplasmic sperm injection (ICSI). Reproduction. 2001 Jun;121(6):925-32. PubMed PMID: 11373179.

Li X, Morris LH, Allen WR. Effects of different activation treatments on fertilization of horse oocytes by intracytoplasmic sperm injection.J ReprodFertil. 2000 Jul;119(2):253-60. PubMed PMID: 10864837.

Morris LH, Hunter RH, Allen WR. Hysteroscopic insemination of small numbers of spermatozoa at the uterotubal junction of preovulatory mares.J ReprodFertil. 2000 Jan;118(1):95-100. PubMed PMID: 10793630.

Morris LH, Fairles J, Chenier T, Johnson WH. Segmental aplasia of the left paramesonephric duct in the cow. Can Vet J. 1999 Dec;40(12):884-5. PubMed PMID: 10646066; PubMed Central PMCID: PMC1539888.