Estrus Synchronization in Sheep and Cattle: Overview and Some Promising Interventions in Ethiopia
Alemu Girmaw Abiy*
Ethiopian Agricultural Transformation Agency Project, Ethiopia
*Corresponding Author: Alemu Girmaw Abiy, Ethiopian Agricultural Transformation Agency Project, Ethiopia.
September 16, 2021 Published: December 10, 2021
Estrus synchronization is the process of targeting female mammals to come to heat within a short time frame usually within 36 to 96 hours. There are different protocols for estrus synchronization in cattle and sheep by which every estrus synchronization protocol has its own advantages and disadvantages. Selecting fittest protocol with animals used to reduce its disadvantage to get optimum estrus and conception rate. The protocol can be based on prostaglandin, progesterone, and gonadotrophin releasing hormone alone or in combination. In Ethiopia prostaglandin and progesterone based synchronization are practiced but prostaglandin based is more popular by which many research results used it and recommended single injection of prostaglandin followed by heat detection is more fittest protocol. Embryo loss is the major problem of estrus synchronization in Ethiopia which needs intervention like Proper nutrition, Animals before start of synchronization should be vaccinated and treatment should be given if the animal was diseased, Select animals with good body condition.
The objective of the paper is
- General objective: To assess different estrus synchronization methods generally accepted for sheep and cattle.
- Specific objectives: To see how each method of synchronization works. To give clue about best estrus synchronization method for Ethiopia.
Keywords: Estrus; Protocol; Hormone
- Azage T., et al. “History and experiences of hormonal estrus synchronization and mass insemination of cattle for improved genetics in Ethiopia: From science to developmental impact”. LIVES Working Paper 16. Nairobi, Kenya. International Livestock Research Institute (ILRI) (2016).
- Bainesagn W. “Assessment of Breeding Practices and Evaluation of estrus synchronization and mass insemination technique in dairy cattle in west shoa zone”. Masters thesis. Haramaya University (2016).
- David L T. Hormonal Control of Ewe Reproduction, proceeding 45th Annual spooner sheep day August 23, University of Wisconsin-Madison College of Agricultural and Life Sciences in cooperation with the Indianhead Sheep Breeders Association (1997).
- Debir L. Assessment of breeding practice and evaluation of estrus synchronization of dairy cattle in sidama zone, southern Ethiopia M. Sc thesis. School of animal and range sciences, college of agricuture, school of graduate studies, Hawassa University, Hawassa, Ethiopia (2016).
- Girmay G., et al. “The Effect of One Shot Prostaglandin on Estrus Synchronization of Local and Holstein Friesian Cattle in and around Wukro Kilte Awulaelo District, Northern Ethiopia”. Journal of Biology, Agriculture and Healthcare7 (2015).
- Islam R. Division of Animal Reproduction, Gynecology and Obstetrics Faculty of Veterinary Sciences and Animal Husbandry, S. K. University of Agricultural Sciences and Technology (K), Srinagar 190006, J and K., India Veterinary World 4.3 (2011): 136-141.
- Kefyalew A and Addis G. “The Status of Estrus Synchronization and Conception Rate in Ethiopian Cattle Breed”. International Journal of Agriculture and Veterinary Sciences1 (2015): 19-26.
- Larson JE., et al. “Synchronization of estrus in suckled beef cows using GnRH, prostaglandin F2α (PG), and progesterone (CIDR): a multi location study”. Journal of Animal Science 87 (2004): 368.
- Lauderdale JW. “Where we have been and where we are today: history of the development of protocols for breeding management of cattle through synchronization of estrus and ovulation”. Proceedings, Applied Reproductive Strategies in Beef Cattle January 28-29, San Antonio, TX. Lauderdale Enterprises, Inc. Augusta, MI 49012 (2010).
- Lauderdale JW. “History, Efficacy and Utilization of prostaglandin f2α for estrous synchronization proceedings, applied reproductive strategies in beef cattle”. November 12 and 13, Texas A&M University, College Station (2005).
- Menchaca A., et al. “Estrous synchronization treatments in sheep”. Revisita Brasileria de Reproducao Animal., Belo Horizonte1 (2017): 340-344.
- Michael WD and Kara KL. “Three Simplified Estrus Synchronization. Programs for Beef Breeding”. Livestock Management LM-14 (2007).
- Odde KG. “A review of synchronization of estrus in postpartum cattle”. Journal of Animal Science 68 (1990): 817-830.
- Patterson DJ., et al. “Division of Animal Sciences University of Missouri, Columbia”. Proceedings, Applied Reproductive Strategies in Beef Cattle. November 12 and 13, Texas A&M University, College Station.
- Santos JEP., et al. “The effect of embryonic death rates in cattle on the efficacy of estrus synchronization programs”. Animal Reproduction Science 82-83 (2004): 13-535.
- Simonetti L., et al. “Factors affecting reproductive performance of artificial inseminated Merino sheep”. Brazilian Journal of Veterinary Research and Animal Science3 (2002): 143-146.
- Solomon G., et al. “Estrus synchronization for accelerated delivery of improved dairy genetics in Ethiopia: Results from action research and development interventions”. LIVES Working Paper 12. Nairobi, Kenya: International Livestock Research Institute (ILRI) (2016).
- Sprott LR and Carpenter BB. “Synchronizing estrus in cattle, agrilife extension texas A&M system B6123” (2007).
- Tadesse G K. “Effects of prostaglandin administration frequency, artificial insemination timing and breed on fertility of cows and heifers in eastern zone of tigray region”. Ethiopia MSc thesis. Mekele University (2015).
- Tegegn F and Zelalem A. “Evaluation of estrus synchronization and mass artificial insemination service of dairy cattle in Mizan Aman area, Bench Maji zone, South West Ethiopia”. International Journal of Livestock Production1 (2017): 1-4.
- Tom RT. “Synchronization of estrus in cattle MP383-PD-8-2” (2007).
- Zeleke M. “Estrus Synchronization and AI as tools for rapid Dissemination of Improved sheep Genotypes”. Workshop on small ruminant breeding programs in Ethiopia DebreBirhan (2015): 17-18.