Pregnancy loss in the female bovine and strategies to improve efficiency in assisted reproductive programs: Animal Health and Production

In artificial insemination (AI) programs, repeated estrus and embryonic (EM) and fetal losses are important causes of low reproductive efficiency in hot climates. This literature review aims to show the causes and strategies to decrease pregnancy losses in cows. In cattle, the fertilization rate is high and occurs in approximately 75 to 90% of the inseminated females. Embryonic losses occur in more than 25% of the services and the highest proportion of them occurs between 15 to 17 days after service and six weeks after the beginning of pregnancy. Biotechnical procedures used to prevent repeat estrus and embryonic and fetal mortality include the use of exogenous hormones including progesterone, estrogens, growth hormone, humanchorionic gonadotropin, hormone releasing factors and recombinant alpha interferon to enhance corpus luteum functions and inhibit the mechanism of luteolysis. Other procedures include the application of various biotechnical estrus synchronization and resynchronization procedures to improve the efficiency of AI services and correct low estrus detection efficiency. Feeding supplementation with unsaturated fat and antioxidants and management measures to reduce the impact of heat stress. These procedures can contribute to improve fertility of cattle in hot climates.

• প্রধান লেখক: Toala Soledispa, Raúl Alexander (author)
• অন্যান্য লেখক: Pedroso Sosa, Rodolfo (author), Burgos Macías, Daniel Isaías (author), Roller Gutierrez, Felicia (author)
• বিন্যাস: article
• ভাষা: spa
• প্রকাশিত: 2024
• বিষয়গুলি: repetición del servicio; pérdidas de la preñez; mortalidad embrionaria.; serviço de repetição; perdas de gravidez; mortalidade embrionária.; repeat service; pregnancy losses; embryonic mortality.
• অনলাইন ব্যবহার করুন: https://revistas.utm.edu.ec/index.php/latecnica/article/view/5472