Marianna M. Jahnke

Associate Teaching Professor
2438 Lloyd
Education & Certifications  

M.S., Department of Animal Science, Iowa State University, Ames- Iowa, 2005 Specialization:  Animal Reproductive Physiology
B.S., Department of Animal Science, Universidade de Alfenas-Minas Gerais- Brazil, 2002


Instructor-in- charge
VDPAM 351 - Bovine Embryo Transfer and Related Technology
VDPAM 451 - Clinical Embryo Transfer

VDPAM 450 - Disturbances of Reproduction
VDPAM 471 - Theriogenology: Food Animal
VCS 471C - Comparative Reproduction

Research Focus & Interests  

Bovine Reproduction, Embryo Transfer, Embryo Micro- Manipulation such as splitting biopsing and sexing, Assisted Reproductive Technologies

Honors & Awards  

2013 IVMA HealthCare Team Service Award for Leadership That Advances the Care of Animal and People


ISU Embryo Transfer Co-Service Leader
ISU VDPAM Curriculum Committee Member


American Embryo Transfer Association (AETA)
International Embryo Transfer Society (IETS)
Iowa Veterinary Medical Association (IVMA)

Selected Publications  

Google Scholar Page

Phillips PE, Jahnke M. Embryo transfer (techniques, donors and recipients). Book chapter Veterinary Clinics of North America. July 2016.

T. M. Dohlman, M. M. Jahnke, J. K. West, P. E. Phillips and P. J. Gunn.  Effects of label-dose permethrin administration on reproductive function in superovulated beef heifers. Accepted in Journal of Theriogenology (August 2015)

Jahnke MM, JK West, and CR Youngs.  2014.  Evaluation of in vivo derived embryos. In (RM Hopper, Ed) Bovine Reproduction, Wiley & Sons, Hoboken NJ (733-748).

Youngs CR, C Messerschmidt, JK West, and M Jahnke. 2012. Osmotic reaction of Jersey dairy cattle embryos exposed to various cryoprotective additives.  Reprod. Dom. Anim.  47(Suppl 4):432.

P. Schmitt, M. Jahnke, J. West. 2011 Comparison of Injection Site on embryo production in dairy heifers.  Summer Scholar Poster

Jahnke, M.M. 2005. Strategies to increase the number of FSH-receptive follicles at the initiation of superovulation in cattle.  M.S. Thesis, Iowa State University.

Youngs, C.R., A.M. Powers-Meyer, A.M., M.G. Wonderlich, and M.B. Moreira.  2004.  The effect of cloprostenol or dinoprost, administered at two different sites, on the expression of estrus in postpartum dairy cattle. Proc. 15th Int'l. Cong. Anim. Reprod. (60).

M.L. Pugh, M.B. Moreira, G.R. Gilbert and C.R. Youngs.  2004.  Influence of prostaglandin F2a synthesis inhibitors on pregnancy rate of embryo transfer recipient heifers.  Proc.15th  Int’l Congress on Animal Reproduction (399)