Joy Altermatt, DVM, MS, DACT

Dr. Joy is originally from Terry, Montana.  A graduate from Montana State University- Bozeman with a BS in Animal Science, she went on to Colorado State University College of Veterinary Medicine, obtaining her DVM in 2004. Pursuing her passion of large animal fertility, she completed a MS in Biomedical Sciences with emphasis in assisted reproduction technologies at CSU's Animal Reproduction and Biotechnology Laboratory. Dr. Joy became board-certified in the American College of Theriogenologists (reproduction specialty) in 2008. Since then, she has been serving her clients in private practice and sharing knowledge as lecturer at Cal Poly, San Luis Obispo since 2012.  As a dedicated specialist in large animal fertility, she has performed thousands of transvaginal follicular aspirations in both mares and cows for oocyte transfer, ICSI and IVF cycles, helping to produce generations of legends. In addition to these procedures and embryo transfers, she enjoys addressing fertility issues and offers multi-faceted approaches and customized options for her clients from simple breeding to in vitro embryo production.  

REPRESENTATIVE PUBLICATIONS

• Owen CM, Johnson MA, Rhodes-Long KA, Gumber DJ, Barceló-Fimbres M, Altermatt JL, Campos-Chillon LF. Novel Synthetic oviductal fluid for Conventional Freezing 1 (SCF1) culture medium improves development and cryotolerance of in vitro produced Holstein embryos. J Anim Sci. 2022 Mar 1;100(3):skac043. doi: 10.1093/jas/skac043.
• Campos-Chillon LF, Martin J and Altermatt JL. Pregnancy obtained in a late gestational mare by in vitro embryo production. Reproduction Fertility and Development 2019; 31:1926-1929
• Campos-Chillon LF, Owen CM and Altermatt JL. Equine and bovine oocyte maturation in a novel medium without CO2 gas phase. Journal of Equine Veterinary Science 2019; 73:51-55
• Roberts, MA, London, KT, Campos-Chillon LF, Altermatt JL. Presumed Monozygotic twins develop following transfer of an in vitro-produced equine embryo. Journal of Equine Science 2015;26(3):89-94.
• Campos-Chillón LF, Mancino, J, Barceló-Fimbres M, Altermatt JL. Progress in genotyping in vitro-produced embryos: are we close? Proceedings, Applied Reproductive Strategies in Beef Cattle 2015, UC Davis, CA
• Barceló-Fimbres M, Campos-Chillón LF, Mtango NR, Altermatt JL, Bonilla L, Koppang R, Verstegen JP. Improving in vitro maturation and pregnancy oucome in cattle using a novel oocyte shipping and maturation system not requiring a CO2 gas phase. Theriogenology 2015 Jul 1;84(1):109-17
• Altermatt JL, Marolf AJ, Wrigley RH, Carnevale EM. Effects of FSH and LH on ovarian and follicular blood flow, follicular growth and oocyte developmental competence in young and old mares. Animal Reproduction Science 2012; 133 (3): 191-197.
• Campos-Chillon LF, Suh TK and Altermatt JL. Intracytoplasmic Sperm Injection in the horse: the ultimate blind date. Acta Scientiae Veterinariae 2010, 38 (2):559-564
• Altermatt JL, Suh TK, Stokes JE, and Carnevale EM. Effects of age and equine follicle- stimulating hormone (eFSH) on collection and viability of equine oocytes assessed by morphology and developmental competencey after intracytoplasmic sperm injection (ICSI). Reproduction Fertility and Development 2009; 21(4):615-23
• Altermatt JL, Suh TK, Stokes JE, Squires EL, Seidel GE and Carnevale EM. Effects of age and FSH on collection of equine oocytes and developmental competency after intracytoplasmic sperm injection. Theriogenology 2007; 68:51

  ABSTRACTS

• Campos-Chillon LF, Bisson M, Barcelo-Fimbres M and Altermatt JL. Morphodynamics of in vitro produced equine embryos: frozen versus cooled semen. Presented at the Society for Theriogenology Conference. Oklahoma 2024
  Campos-Chillon LF and Altermatt JL. Effect of cooled vs frozen stallion semen on the efficiency of equine in vitro embryo production. Journal of Equine Veterinary Science. 2023 Jun 1;125:104634. Presented at the International Symposium of Equine Reproduction. Foz de Iguazu, Brazil 2023​
• Campos-Chillon LF and Altermatt JL. Ovum pick up and in vitro embryo production in pregnant mares. Journal of Equine Veterinary Science 2021, 89: 103048. Presented at the International Symposium of Equine Embryo Transfer Pisa Italy 2022
• Campos-Chillon LF and Altermatt JL. In vitro and in vivo embryo production during foal heat in a mare: A case report. Reprod. Fertil Dev. 2020; 32:132
• Helland CM, Reichelderfer RL, Owen CM, Barcelo-Fimbres M, Altermatt JL and Campos-Chillon LF. Developmental competence of bovine oocytes matured in defined medium. Reprod Fertil Dev. 2019; 31:206
• Campos-Chillon LF, Owen CM and Altermatt JL. Equine oocyte maturation in a novel maturation medium without CO2 gas phase.  International Symposium of Equine Reproduction, 2018. Cambridge, UK. Journal of Equine Veterinary Sciene. 2018 July; 66:189
• Owen CM, Barcelo-Fimbres M, Altermatt JL and Campos-Chillon LF. Effect of polydatin on development and cryotolerance of in vitro-produced bovine embryos. Reprod Fertil Dev. 2018; 30:178
• Choi W, Owen CM, Barcelo-Fimbres M, Altermatt JL and Campos-Chillon LF. Effects of day 5 or 6 HEPES-buffered transportation culture medium on developmental competence of bovine in vitro-produced embryos. Reprod Fertil Dev. 2018; 30:179
• Owen CM, Barceló-Fimbres M, Altermatt JL, Campos-Chillon LF. Survival rate of Holstein in vitro produced embryos cultured in a novel SOF media (SCF1) and dehydrated prior to cryopreservation. Reproduction Fertility and Development. Reprod Fertil Dev. 2016; 29:129-130
• Roberts MA, Gumber DJ, Barceló-Fimbres M, Altermatt JL, and Campos-Chillón LF. Evaluation of lipid content, mitochondrial polarity, and cryotolerance of Holstein in vitro¬produced embryos following culture with Vitamin K2, Forskolin, and conditioned medium. Clinical Theriogenology 2016 8(3):313
• Campos-Chillon LF and Altermatt JL. Window to synchronization – using ultrasound and timed AI in your herd. Golden State Dairy Management Conference Proceedings 2016 1:120-129
• Roberts MA, Campos-Chillon LF, Barcelo Fimbres, M and Altermatt JL. Effect of media, metabolic regulators and stage of development on lipid content and mitochondrial polarity of bovine in vitro produced Holstein embryos. Reproduction Fertility and Development. 2016 28(2):174
• Rhodes-Long K, Campos-Chillon LF, Barcelo-Fimbres M and Altermatt JL. Lipid content of in vivo and in vitro produced Jersey and Holstein cattle embryos and the effect of Forskolin on embryo lipid reduction. Reproduction Fertility and Development. 2016 28(2):174b.
• Araújo RR,De Bem THC, Sangalli JR, Perecin , Campos-Chillon F, Altermatt JL, Suh TK, Campos JR, Woodward E, Klein C, Troedsson MH, Meirelles FV, Silva LA. Large-scale study on the recovery and quality of equine oocytes with emphasis on the age effect. ABRAVEQ – Associação Brasileira dos Médicos Veterinários de Equideos, 2012.
• Campos-ChillonLF, Suh TK, Araujo RR, Altermatt JL. Equine Embryo Sexing. International Symposium of Equine Reproduction (Practitioners Forum) 2010.
• Campos-Chillon LF and Altermatt JL. Cryopreservation of equine embryos: ice or glass? Acta Scientiae Veterinariae. 2010, 38 (Suppl 2):332
• Campos-Chillon LF, Clay CM, Altermatt JL, Bouma GJ and Carnevale EM. Differences in resumption of oocyte maturation in young and old mares. Reproduction Fertility and Development2008; 20:81
• Altermatt JL, Suh TK, Stokes JE, Campos-Chillon LF, and Carnevale EM. Effect of mare age on oocyte morphology and developmental competence after ICSI. Reproduction Fertility and Development 2008; 20:215
• Carnevale EM, Squires EL, Campos-Chillon LF, Altermatt JL, and Suh TK. Clinical use of intracytoplasmic sperm injection in horses. AAEP Proceedings 2007

---