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We are advanced genetics for your cattle, horses and more.

To provide you the best service, our team is multidisciplinary made up of veterinarians and embryologists, with a constant commitment to the client to offer them the best results.

Arnoldo Hernandez Demara 



Reproduction in Cattle and Horses.

Professional license:4508864

EDUCATION: Veterinary Medicine, 1998, Technological Institute of Sonora (ITSON)

  • Honorific mention.

  • Distinguished Alumnus.

  • Diploma in Administration, Sales and Marketing, ITESM, 1999.


  • Equine Hospital, Dr. Galán, Guadalajara, Jalisco, Mex., 1996.

  • Equine Hospital, UNAM, Mexico City, 1998.

  • Embryo Transfer in Bovines, Livestock Company. Santa Genoveva, Campeche, Camp. 2004.


  • Artificial Insemination in Bovines, CONAMEGRA, Mexican Government, Querétaro, Qro. 1994.

  • Semen freezing, ITSON, 1995.

  • Practical Annual Congress of Equines, Juriquilla, Qro. Mexico, 1996.

  • Annual Congress of Porcine Specialists, Ixtapa, Gro. Mex. nineteen ninety six.

  • Neuro Linguistic Programming for sales. American Management Association. Mexico, DF, 1998.

  • Practical Anesthesia in Equines. UNAM. Mexico DF, 1998.

  • Nutrition and Control Conference. Arizona State University. Tempe, Az. USES. 2002.

  • Nutrition and Control Conference. Arizona State University. Tempe, Az. USES. 2003.

  • Annual Symposium on Cattle Reproduction. Pfizer. Mexico, DF, 2004.

  • VII International Course on Equine Reproduction. UNAM. Mexico, DF, 2009.

  • Cytology and Endometrial Biopsy in Equines. UNAM. Mexico, DF, 2009.

  • Stallion Semen Freezing School. The breeder's Assistant. Ramona, Ca. USA., 2010.

  • Ovusem Congress. Advances in Bovine Reproduction. July 16 and 17, 2015. Guadalajara, Jal.


  • Assisted Reproduction Techniques in Equines. Diplomat. Higher School of Veterinary Medicine. Puebla, Mex. 2011.


  • Dental Prostheses in Bovines. Livestock Sound Magazine. 2011.

  • Mastitis in Heifers. Livestock Sound Magazine. 2011.

  • Results of Sexed Semen in cows. Sonora Livestock Magazine Magazine. 2011.

  • Hypodermis. Livestock Sound Magazine. 2012.

  • Artificial insemination with fresh semen in beef cattle.


  • Corrales Rio Yaqui. get fat Vet. Cd. Obregon Sonora, Mex. 1997.

  • Fort Dodge Animal Health. Technical Services in fattening. Culiacán, Sinaloa and Mexico, DF, 1998-1999.

  • SAY. Veterinary Adviser in Fattening. Culiacan, Sin. Mex. 1999-2000.

  • Moor Man's-Vimifos. Cow and calf nutrition consultant. Magdalena de Kino, Son. Mex. 2000-2002.

  • COBACH. Biology teacher. Magdalena de Kino, Son. Mex. 2001-2002

  • Private Practice. Reproduction, Nutrition, Surgery and General Clinic Service in Bovines and Equines. 2002-date.

  • Stotz Dairy, Buckeye, Az. Reproduction Advisor. January 2014-Oct 2014


  • American Association of Equine Practitioners. International Member.

  • Imuris General Local Livestock Association. Partner.


  • Ultrasound and transrectal palpation in Bovines and Equines.

  • Artificial Insemination in Cattle and Horses

  • Embryo transfer in both species.

  • Ironwork, sufficient cold experience.

  • Advice, administration and management of cattle ranches.

  • Cryptorchidism surgery in horses.

  • Marketing of cattle and horses

  • Intermediate-advanced handling of Windows programs, Word, Power Point, Excell.

  • English: Reading 90%, Writing 70%, Speaking 70%

  • Teaching courses, seminars, etc. in the area of reproduction.


Dr. José J. Hernández-Ledezma 


Zootechnical Veterinary Doctor

Faculty of Veterinary Medicine and Zootechnics, Universidad Veracruzana.

Master of Science 

Dept of Animal Science. University of Missouri-Columbia.


Animal Sciences Dept. Washington State University.


Dept of Animal Science. University of Missouri-Columbia.


Clinical Embryology and Clinical Andrology by the American Association of Bioanalysts (AAB).

Jobs and Relevant Professional Positions

  • Researcher in the area of animal reproduction of the National Institute of Livestock Research (INIP / INIFAP) in the Livestock Experimental Centers "La Posta" in Paso del Toro, See in dairy cattle and "Playa Vicente" in Lealtad de Muñoz, Playa Vicente , See. in zebu cattle.

  • Regional Director of the Gulf of the Animal Reproduction Department of the National Institute of Livestock Research (INIP / INIFAP)

  • National Director of the Animal Reproduction Department of the National Institute for Livestock Research (INIP / INIFAP).

  • Founder and Director of various human fertility laboratories both in Mexico (Querétaro, Tijuana, Morelia) and in the United States (St. Louis, MO; Houston, TX).

  • Advisor to private livestock companies involved in the transfer and production of in vitro embryos in the US, as well as in Mexico.

  • Laboratory Inspector of the College of American Pathologists) in the USA


Professional Practical Experience

As a researcher and director in the Department of Animal Reproduction of INIP / INIFAP, I have accumulated vast experience in the management of dairy and beef cattle in the tropics using technological tools such as heat synchronization, artificial insemination, gamete and embryo management as well as in conducting and analyzing experiments to determine how the high humidity and hot environment of the tropics affected the reproductive performance of dairy cattle.

In his doctoral studies, he carried out research on egg freezing for subsequent in vitro fertilization (IVF), being one of the first in the world to report the combination of two cryoprotectants used successfully to preserve frozen embryos.

Later in his postdoc at the University of Missouri-Columbia he was in charge of mass producing thousands of in vitro bovine embryos to be used in other research studies in the laboratory of Dr. Michael R. Roberts. As a result of these activities, the following practical and scientific achievements were obtained:

  • To demonstrate for the first time using molecular techniques (RT-PCR) and bioassays the initiation of the synthesis of the bovine trophoblastic protein (b-TP1) now known as Interferon-Tau in embryos produced in-vitro. This protein's main function is to inhibit the production of uterine prostaglandins to prevent the destruction of the corpus luteum in the ovary and thus achieve the permanence and growth of the embryo.

  • We were the first to successfully report the "sequential culture of embryos in-vitro" using the simple CZB medium in the first three days of embryo life followed by the TCM-199 complex medium. Subsequently, different commercial media arose in the market.

  • Likewise, we were able to understand that the main objective of an in vitro embryo production system should focus mainly on obtaining a high percentage of embryos of 6 to 8 cells on day three to obtain a high proportion (>80%) of usable blastocysts.

  • From the above, we created the following quality indicators or Key Performance Indicators (KPIs): >70% of embryos with 6 to 8 cells, <10% of 4 cells and <20% of embryos with 1 and 2 cells. Which are applied in a similar way both in humans and bovines.

  • In a project for the production of transgenic embryos, we characterized the time of appearance of the male and female pronuclei (12-24 hours post insemination), with the highest incidence at 18 hours.

  • The efficiency of different somatic cell lines (hepatic, connective, oviductal and renal) to be used in co-culture with embryos was determined.

  • We demonstrate the inhibitory effect of complex media (TCM-199) on embryo development from day 1 to day 3 and the decrease in this effect as the proportion of a simple medium such as CZB increases.

  • From all of the above, more than seven scientific publications and several book chapters arose.

Professional Certifications

Certified by the American Board of Bioanalysis as Director of High Complexity Laboratories (HCLD), Clinical Consultant (CC).

Scientific Publications

It has more than a hundred international scientific publications with an editorial committee, popular publications and producer magazines, as well as summaries in international meetings and book chapters.


MC Uriel F. Valdez Olmos 


Clinical Biologist Chemistby the Department of Biological Chemical Sciences at the University of Sonora, Campus Hermosillo.

Master in Food Science and Technologyby the Department of Research and Graduate Studies in Food (DIPA).

Professional Positions

  • Part of the research group in the biochemical and genetic area with marine animals and their pathologies. Department of Biological Chemical Sciences, University of Sonora, Hermosillo Son.

  • Part of the Biochemistry/proteomics research group in marine animals in relation to hypersensitivity in humans. Department of Research and Graduate Studies in Food (DIPA). University of Sonora, Hermosillo Son.

  • Chemical analyst at the Family Medicine Clinic of the Institute of Security and Social Services for State Workers (ISSSTE) as a practical service provider. Hermosillo Son.

  • Chemist analyst and in charge of chemical-clinical processes, as well as clinical endocrinology. San José Laboratory, Hermosillo Son.

  • Fellow in animal and human reproduction and genetics. Fertilite Medical Group. Tijuana Baja California.


Professional Practical Experience

As a collaborator in the different research areas, an appropriate methodology was developed for the insertion of the vector with the amino acid sequence that codes for a thermolabile protein with hemolytic power. We evaluated different solutions to inhibit its function. The results indicate that we can reduce the toxic potential of this hemolysin in marine animals, for example, shrimp.

On the other hand, and also as a collaborator. I conducted human research to identify allergy-causing proteins in susceptible individuals. Three potentially allergenic proteins were found (α-actin, hemocyanin and suggestively triose phosphate isomerase). Proteins that had not been reported as an allergen in the investigated organism.

As a chemical analyst, I was part of sample handling, equipment. Interaction with patients and doctors. Also, as in charge of clinical chemistry and endocrinology, I processed countless blood samples for the correct medical diagnosis, as well as the processing of direct spermatobioscopies; in order to diagnose fertility, control and follow-up of patients with vasectomy.

On the other hand, I am continuing my specialization and continuous improvement as an embryologist and andrologist in animals and humans. I have participated in manipulation of oocytes and embryos. I have also been a participant in the in vitro fertilization process by the Intracytoplasmic Sperm Injection (ICSI) method.

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