E-ISSN 2983-757X
 

Original Article
Online Published: 12 Sep 2025
 


Effect of Bull Bio-stimulation on the reproductive parameters of post-partum anestrous cows

Mohammad Mizanur Rahman, Md. Jobair Hakim, Md Rabiul Islam, M. A. Rahman-rahim, Md Ridoan Pasha, Amir Hossan Shaikat, Mohammad Rashedul Alam.


Abstract
Background: Postpartum anestrus is a major reproductive challenge that hinders optimal productivity in dairy cattle, especially in tropical systems. Among non-hormonal strategies, bull bio-stimulation has emerged as a natural, low-cost approach to enhance ovarian resumption.
Aim: This study investigated the influence of bull exposure on reproductive hormone profiles, hematological and biochemical parameters, and key fertility outcomes in postpartum Holstein Friesian crossbred cows under controlled farm conditions.
Methods: Twenty-two non-cyclic postpartum cows, 60 days after calving, were divided into two groups: one exposed to a bull (BE; n=11) and the other not exposed (NBE; n=11). Over 21 days, estrus behavior, blood hormonal (E2, P4, LH, FSH), hematological, and biochemical parameters were assessed.
Results: Bull exposure significantly accelerated the resumption of ovarian activity (81.82% vs. 27.27%) and improved progesterone levels (P<0.05). The exposed group showed fewer services per conception (1.33±0.16 vs. 1.85±0.34), and a higher conception rate (90.90% vs. 63.63%). Biochemical analysis revealed lower total protein and globulin levels, while hematological profiles showed elevated ESR, MCV, and MCH in the bull-exposed group.
Conclusion: Bull bio-stimulation significantly improves postpartum reproductive efficiency in dairy cows through enhanced ovarian activity and favorable endocrine and hematological changes. This technique offers a practical, drug-free solution for improving fertility in resource-limited farming systems.

Key words: Bull bio-stimulation, Dairy cow fertility, Hematological parameters, Postpartum anestrus, Reproductive hormones


 
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How to Cite this Article
Pubmed Style

Rahman MM, Hakim MJ, Islam MR, Rahman-rahim MA, Pasha MR, Shaikat AH, Alam MR. Effect of Bull Bio-stimulation on the reproductive parameters of post-partum anestrous cows. J Res Vet Sci. 2025; 5(4): 322-329. doi:10.5455/JRVS.20250528025057


Web Style

Rahman MM, Hakim MJ, Islam MR, Rahman-rahim MA, Pasha MR, Shaikat AH, Alam MR. Effect of Bull Bio-stimulation on the reproductive parameters of post-partum anestrous cows. https://www.wisdomgale.com/jrvs/?mno=261230 [Access: September 18, 2025]. doi:10.5455/JRVS.20250528025057


AMA (American Medical Association) Style

Rahman MM, Hakim MJ, Islam MR, Rahman-rahim MA, Pasha MR, Shaikat AH, Alam MR. Effect of Bull Bio-stimulation on the reproductive parameters of post-partum anestrous cows. J Res Vet Sci. 2025; 5(4): 322-329. doi:10.5455/JRVS.20250528025057



Vancouver/ICMJE Style

Rahman MM, Hakim MJ, Islam MR, Rahman-rahim MA, Pasha MR, Shaikat AH, Alam MR. Effect of Bull Bio-stimulation on the reproductive parameters of post-partum anestrous cows. J Res Vet Sci. (2025), [cited September 18, 2025]; 5(4): 322-329. doi:10.5455/JRVS.20250528025057



Harvard Style

Rahman, M. M., Hakim, . M. J., Islam, . M. R., Rahman-rahim, . M. A., Pasha, . M. R., Shaikat, . A. H. & Alam, . M. R. (2025) Effect of Bull Bio-stimulation on the reproductive parameters of post-partum anestrous cows. J Res Vet Sci, 5 (4), 322-329. doi:10.5455/JRVS.20250528025057



Turabian Style

Rahman, Mohammad Mizanur, Md. Jobair Hakim, Md Rabiul Islam, M. A. Rahman-rahim, Md Ridoan Pasha, Amir Hossan Shaikat, and Mohammad Rashedul Alam. 2025. Effect of Bull Bio-stimulation on the reproductive parameters of post-partum anestrous cows. Journal of Research in Veterinary Sciences, 5 (4), 322-329. doi:10.5455/JRVS.20250528025057



Chicago Style

Rahman, Mohammad Mizanur, Md. Jobair Hakim, Md Rabiul Islam, M. A. Rahman-rahim, Md Ridoan Pasha, Amir Hossan Shaikat, and Mohammad Rashedul Alam. "Effect of Bull Bio-stimulation on the reproductive parameters of post-partum anestrous cows." Journal of Research in Veterinary Sciences 5 (2025), 322-329. doi:10.5455/JRVS.20250528025057



MLA (The Modern Language Association) Style

Rahman, Mohammad Mizanur, Md. Jobair Hakim, Md Rabiul Islam, M. A. Rahman-rahim, Md Ridoan Pasha, Amir Hossan Shaikat, and Mohammad Rashedul Alam. "Effect of Bull Bio-stimulation on the reproductive parameters of post-partum anestrous cows." Journal of Research in Veterinary Sciences 5.4 (2025), 322-329. Print. doi:10.5455/JRVS.20250528025057



APA (American Psychological Association) Style

Rahman, M. M., Hakim, . M. J., Islam, . M. R., Rahman-rahim, . M. A., Pasha, . M. R., Shaikat, . A. H. & Alam, . M. R. (2025) Effect of Bull Bio-stimulation on the reproductive parameters of post-partum anestrous cows. Journal of Research in Veterinary Sciences, 5 (4), 322-329. doi:10.5455/JRVS.20250528025057





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