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Journals / Harran Üniversitesi Veteriner Fakültesi Dergisi / 2026 / Volume: 14 Issue: 1

Hormonal and metabolic effects on antral follicle count in dairy cows

Sütçü İneklerde Antral Folikül Sayısının Hormonal ve Metabolik Etkileri

Vefa Tohumcu(ATATÜRK ÜNİVERSİTESİ, VETERİNER FAKÜLTESİ)0000-0003-4062-7513
Damla Tuğçe Okur(ATATÜRK ÜNİVERSİTESİ)0000-0003-2733-2155
Alper Yasin Çiplak(ATATÜRK ÜNİVERSİTESİ)0000-0002-7912-7703
Şifanur Aydin(ATATÜRK ÜNİVERSİTESİ)0000-0002-8332-0514
Mehmet Cengiz(MUĞLA ÜNİVERSİTESİ)0000-0001-9913-3468
Pages
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Publication Date
2025-06-19
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

In conclusion, the findings suggest that AFC has a significant effect on hormonal profiles and energy metabolism in dairy cows.

📌 3 Key Takeaways

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Objective & Hypothesis:This study aimed to investigate the relationship between antral follicle count (AFC) and hormonal profiles as well as metabolic status in dairy cows.
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Key Findings & Data:A total of 32 Holstein cows aged between 2 and 4 years and in their 60th day of lactation were included.
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Conclusion & Impact:In conclusion, the findings suggest that AFC has a significant effect on hormonal profiles and energy metabolism in dairy cows.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Anti-Müllerian hormone · Antral follicle count · Dairy cows

Abstract

This study aimed to investigate the relationship between antral follicle count (AFC) and hormonal profiles as well as metabolic status in dairy cows. A total of 32 Holstein cows aged between 2 and 4 years and in their 60th day of lactation were included. Based on ultrasonographic evaluations, the cows were divided into two groups according to their AFC: low AFC ( 0.05). However, E2 levels on Day 9 were significantly higher in the low AFC group compared to the high AFC group (P = 0.004). Additionally, P4 levels were significantly higher in the low AFC group on Days 0, 6, and 9 (P < 0.05). In contrast, BHBA levels were significantly elevated in the high AFC group across all time points (P < 0.05). Cholesterol levels were consistently higher in the low AFC group throughout the study (P < 0.05). In conclusion, the findings suggest that AFC has a significant effect on hormonal profiles and energy metabolism in dairy cows. Particularly, the elevated steroid hormone levels observed in the low AFC group may reflect a compensatory mechanism to sustain reproductive function in conditions of limited follicular reserve.

Özet

Bu çalışma, süt ineklerinde antral folikül sayısı (AFC) ile hormonal profiller ve metabolik durum arasındaki ilişkiyi araştırmayı amaçlamıştır. Çalışmaya, 2 ile 4 yaşları arasında ve laktasyonun 60. gününde bulunan toplam 32 Holstein ineği dahil edilmiştir. Ultrasonografik değerlendirmelere göre inekler, AFC değerlerine göre düşük AFC ( 0.05). Ancak, 9. günde E2 seviyeleri düşük AFC grubunda, yüksek AFC grubuna kıyasla anlamlı derecede daha yüksek saptanmıştır (P = 0.004). Buna ek olarak, 0., 6. ve 9. günlerde düşük AFC grubunda P4 seviyeleri anlamlı derecede daha yüksek bulunmuştur (P < 0.05). Buna karşılık, tüm zaman noktalarında yüksek AFC grubunda BHBA seviyeleri istatistiksel olarak anlamlı düzeyde daha yüksek tespit edilmiştir (P < 0.05). Kolesterol seviyeleri ise çalışma boyunca düşük AFC grubunda tutarlı bir şekilde daha yüksek bulunmuştur (P < 0.05). Sonuç olarak, elde edilen bulgular AFC’nin süt ineklerinde hormonal profiller ve enerji metabolizması üzerinde önemli bir etkisi olduğunu göstermektedir. Özellikle düşük AFC grubunda gözlemlenen artmış steroid hormon seviyeleri, sınırlı foliküler rezerv koşullarında üreme fonksiyonunun sürdürülebilmesi için bir telafi mekanizmasını yansıtıyor olabilir.

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Cite This Article

Tohumcu, V., Okur, D. T., Çiplak, A. Y., Aydin, Ş., Cengiz, M. (2025). Hormonal and metabolic effects on antral follicle count in dairy cows. Harran Üniversitesi Veteriner Fakültesi Dergisi, Volume: 14 Issue: 1. https://doi.org/10.31196/huvfd.1603378

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