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Theriogenology Lab
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The lab studies the causes and treatment of infertility in dairy cows, as well as reproduction in wild animals.
AboutAbout the lab
From cattle infertility to wildlife reproduction
The Theriogenology Lab investigates the causes of infertility and its treatment in cattle, especially dairy cows, in order to improve their productivity.
Focusing on the function of the vagina and uterus among the causes of infertility, the lab conducts research using live cows and cultured cells.
For the conservation of wildlife, the lab also studies reproductive physiology and assisted reproductive technologies in a variety of animals, building on the knowledge and techniques developed with livestock.
Besides research, the lab is in charge of reproductive management of the dairy cows at the affiliated farm (such as artificial insemination and assistance with calving) and provides consultation on the breeding of zoo animals.
Key terms
- Assisted reproductive technology
- Techniques such as artificial insemination and semen cryopreservation that help animals reproduce through human intervention
- Epidermal growth factor
- A protein that promotes cell proliferation. It is abbreviated as EGF
- Seminal plasma
- The fluid portion of semen, excluding the sperm
NewsLab news
A doctoral student received the Excellent Presentation Award (Veterinary Reproduction Section) at the Annual Meeting of the Japanese Society of Veterinary Science
A doctoral student received the Excellent Poster Award at the Japanese Society of Zoo and Wildlife Medicine
ResearchResearch themes
The lab investigates the causes of infertility in dairy cows, focusing on the function of the vagina and uterus, with the aim of developing methods that make conception easier. Making use of techniques developed with livestock, it also conducts research to support the reproduction of wild and zoo animals.
*Illustrative imageBovine Infertility from the Perspective of the Uterus and Vagina
The lab is studying methods to prevent and treat abnormal concentrations of epidermal growth factor (EGF) in the endometrium, which is seen in cows that have difficulty conceiving. It has shown that this abnormality is corrected by introducing substances such as seminal plasma proteins into the vagina, and it aims to clarify the mechanism behind this.
*Illustrative imageConservation Breeding of Wild and Zoo Animals
For wild and zoo animals whose reproductive mechanisms are not well understood, the lab is clarifying reproductive physiology and developing assisted reproductive technologies such as semen cryopreservation and artificial insemination, in cooperation with staff at animal-keeping facilities and veterinarians across Japan.
MembersFaculty
The members of the Theriogenology Lab consist of faculty, doctoral and undergraduate students, international students, postdoctoral researchers, research students, and research assistants and administrative staff.As of 2026
- ProfessorSeiji Katagiri
- Associate ProfessorYojiro Yanagawa
- Assistant ProfessorTakashi Tanida
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Dunnum Family's Top of the Town dairy farm near Westby in Vernon County, Wisconsin” Carol M. Highsmith / Public domain (cropped)
- Bovine Infertility from the Perspective of the Uterus and Vagina: “Artificial insemination of a dairy cow” Aleks / CC BY-SA 3.0 (cropped)
- Conservation Breeding of Wild and Zoo Animals: “Gefriersperma” Uwemuell / CC BY-SA 3.0 (cropped)
- Related lab (野
生動物学教室): “Ursus arctos lasiotus” Nathan Ruser / CC BY-SA 4.0 (cropped) - Related lab (比較病理学教室): “Tissue processing - Stained and mounted slides in the ubiquitous 20-slide folder” Ed Uthman / CC BY-SA 2.0 (cropped)
- Related lab (毒性学教室): “Lascar Hippopotamus (Zambezi river) ( )” Jorge Láscar from Australia / CC BY 2.0 (cropped)
- Related lab (感染症学教室): “Red holstein cows near Josselin 01” Tsaag Valren / CC BY-SA 4.0 (cropped)
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