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Pharmacological Control of Estrus in Tropical Cattle, an Economical Assessment of Different Synchronization Protocols

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DOI: 10.4236/ojvm.2012.23024    4,563 Downloads   7,619 Views   Citations


To compare the fertility results and to assess the cost-effectiveness of several synchronization protocols applied under the conditions of beef cattle enterprises in Colombia, 1658 multiparous zebu crossbred cows mostly Brahman and Nelore ranging between 2 - 6 parities were used. Five protocols of pharmacological treatments varying in hormones used, dosage and the time of application were tested. All cows were inseminated at 52 h by appointment. Pregnancy diagnosis was undertaken over 45 d after insemination by rectal palpation. The total cost per cow and the total cost per gestation, for each protocol, were calculated. Taking a herd of one-hundred cows as baseline for calculations, it was estimated the cost of the total amount of pregnancies possibly obtained in each protocol; then, the excess between the costs of a pregnant cow and the cost of a treated cow was estimated. Additionally, the costs due to cows empty after four services were calculated. A total of 874 pregnancies were registered (52.7%), with pregnancies per protocol varying between 46.9% and 66.2% (p < 005). The cost per treated cow, varied between $64.08 and $97.47 and the cost per gestation from $126.01 to $177.26, without association between the cost of the treatment and the pregnancy rate. Protocol A was the best cost-effective with the lowest additional costs, the lowest amount of open days (2107.7 to 2231.7 d) and IA straws (average = 134), with an additional costs of $6940.00. Synchronization of estrus using pharmacological products seems to have a place in the management of cattle; however, caution should be called upon a careful assessment both from the part of the farm and the professional in charge of the enterprise to avoid using the technique indiscriminatively thus propitiating the use of a method that might not be cost efficient.

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The authors declare no conflicts of interest.

Cite this paper

J. J. Molina, I. Molina, A. Jiménez, C. S. Galina and J. J. Romero, "Pharmacological Control of Estrus in Tropical Cattle, an Economical Assessment of Different Synchronization Protocols," Open Journal of Veterinary Medicine, Vol. 2 No. 3, 2012, pp. 151-157. doi: 10.4236/ojvm.2012.23024.


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