The Effects of GnRH and hCG Administration on Pregnancy Rate in Postpartum Dairy Cows-Reference-Cited by-同舟云学术

The Effects of GnRH and hCG Administration on Pregnancy Rate in Postpartum Dairy Cows

Published:2022-09-09 Issue: Volume: Page:12-18
ISSN:2717-8331
Container-title:Livestock Studies
language:en
Short-container-title:

Author:

KARSAVURANOĞLU Emre¹,SARIBAY Mustafa Kemal²,KOLDAŞ ÜRER Ece²

Affiliation:

1. HATAY MUSTAFA KEMAL UNIVERSITY, FACULTY OF VETERINARY MEDICINE

2. HATAY MUSTAFA KEMAL UNIVERSITY, FACULTY OF VETERINARY MEDICINE, VETERINARY MEDICINE PR.

Abstract

This study was designed to determine the effects of GnRH administration alone at the time of artificial insemination (AI) or in combination with hCG 5 days after GnRH injection on conception rates in postpartum dairy cows. Cows in estrus, without any reproductive health problem, between days 70-120 postpartum were randomly assigned to 3 equal groups. Buserelin acetate (10 µg), was administered at the time of AI to Group I (n=40). Group II (n=40) was administered first with Buserelin acetate (10 μg) at the time of AI and then with 1500 IU of hCG on the 5th day after insemination. Group III was maintained for control purposes and did not receive any treatment. Pregnancy diagnosis was performed on day 30 post-AI by transrectal ultrasonography. Conception rates were 80% (32/40), 80% (32/40), and 57.5% (23/40) in Group I, II and III (P

Publisher

Uluslararasi hayvancilik arastirma ve egitim merkezi mudurlugu Livestock Studies dergisi

Reference48 articles.

1. Besbaci, M., Abdelli, A., Minviel, J. J., Belabdi, I., Kaidi, R., & Raboisson, D. (2020). Association of pregnancy per artificial insemination with gonadotropin-releasing hormone and human chorionic gonadotropin administered during the luteal phase after artificial insemination in dairy cows; A meta-analysis. Journal of Dairy Science, 103(2), 2006-18. doi: 10.3168/jds.2019-16439

2. Boulton, A. C., Rushton, J., & Wathes, D. C. (2017). An empirical analysis of the cost of rearing dairy heifers from birth to first calving and the time taken to repay these costs. Animal, 11(8), 1372-80. doi: 10.1017/S1751731117000064.

3. Canadas, E. R., Gobikrushanth, M., Fernandez, P., Kenneally, J., Lonergan, P., & Butler, S. T. (2019). Evaluation of alternative strategies to treat anoestrous dairy cows and implications for reproductive performance in pasture-based seasonal calving herds: A pilot study. Theriogenology, 127, 130-36. doi: 10.1016/j.theriogenology.2019.01.008.

4. Colazo, M. G., Behrouzi, A., Ambrose, D. J., & Mapletoft, R. J. (2015). Diameter of the ovulatory follicle at timed artificial insemination as a predictor of pregnancy status in lactating dairy cows subjected to GnRH-based protocols. Theriogenology, 84(3), 377-83. doi: 10.1016/j.theriogenology.2015.03.034

5. De Rensis, F., Lopez-Gatius, F., Garcia-Ispierto, I., & Techakumpu, M. (2010). Clinical use of human chorionic gonadotropin in dairy cows: an update. Theriogenology, 73(8), 1001-08. doi: 10.1016/j.theriogenology.2009.11.027