INFLUENCE OF THE PRE-OVULATORY FOLLICLE DIAMETER ON THE PREGNANCY RATE OF COWS SUBMITTED TO FTAI

Authors

Keywords:

Artificial insemination, Biotechnology, Reproduction in cattle

Abstract

Fixed-time artificial insemination (FTAI) is a reproductive biotechnology used to improve the performance of herds through hormonal protocols. The use of this technique allows to induce cow cyclicity, besides eliminating the estrus observation, which has been a great differential for the growth of FTAI. An important point in the conception rate of cows is the size of the pre ovulatory follicle. The objective of this study is to confirm the existence of correlation between follicular diameter and gestation rate of cows. Thirty cows of three different breeds were used, among them Nelore, Purunã and crossbreed, and the measurement of the follicular diameter was performed by transrectal ultrasonography before FTAI. The animals were divided into two groups (G1= <10 mm e G2= <10 mm).  Thirty days after FTAI, the diagnosis of gestation was performed by rectal palpation and transrectal ultrasonography. The conception rate was 53.33% (16/30), among this 13,33% for the G1 and 40% for G2, besides that there was no influence of the follicular diameter (p= 0,056). This study suggests further resarch about the subject.

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Published

15-12-2020

How to Cite

Souza Lima, C. V., de Oliveira Alves, T., Ferrarini, G. M., Balduino Gimenes, F., Menezes de Souza, E., & Romero Gonçalves, G. (2020). INFLUENCE OF THE PRE-OVULATORY FOLLICLE DIAMETER ON THE PREGNANCY RATE OF COWS SUBMITTED TO FTAI. Uningá Review, 35, eRUR3622. Retrieved from https://revista.uninga.br/uningareviews/article/view/3622

Issue

Vol. 35 (2020)

Section

Environment and Agricultural Sciences

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Copyright (c) 2020 REVISTA UNINGÁ REVIEW

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I declare/we declare that the text submitted here is original, of my own authorship and does not infringe any type of third party rights. The content is my/our sole responsibility. Possible research involving animals and/or human beings is in accordance with Resolution 196/96 of the National Health Council and its complements. I declare that I am/we are in possession of the written consent of patients and that the research and its procedures were timely and adequately approved by the Ethics Committee of the institution of origin. We further declare that all institutional affiliations and all sources of financial support for the work are duly informed. I certify that there is no commercial or associative interest that represents a conflict of interest related to the submitted work. If there is commercial interest, in addition to the technical and academic ones, in the publication of the article, the information will be reported during the text.