Journals / Ankara Üniversitesi Veteriner Fakültesi Dergisi / 2022 / Cilt: 69 - Sayı: 1

The negative effects of cold conditions on pregnancy rates in dairy cows

Soğuk şartların süt ineklerinde gebelik oranları üzerindeki olumsuz etkileri

Pages
77–82
Publication Date
2022-10-12
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

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

Overall pregnancy rates (%) at the first service were 57.1 and 40.0 for Groups CoS and dPG, respectively (2 = 2.03, P = 0.15) and 35.0 and 66.7% during cold and warm seasons, respectively (2 = 6.78, P = 0.009).

📌 3 Key Takeaways

🎯
Objective & Hypothesis:This study was conducted to determine the pregnancy rate in response to two sexual synchronization protocols in 70 healthy multiparous Fleckvieh dairy cows during the cold and warm seasons.
📊
Key Findings & Data:After pairing by the actual parturition date [cold seasons (-38 to 0 ºC) (Nov - Feb) vs. warm seasons (0 to 32 ºC) (Mar-Oct)], cows were randomly subjected to either Co-Synch (CoS) or double PGF2α injection (dPG) on d 35 postpartum.
💡
Conclusion & Impact:Overall pregnancy rates (%) at the first service were 57.1 and 40.0 for Groups CoS and dPG, respectively (2 = 2.03, P = 0.15) and 35.0 and 66.7% during cold and warm seasons, respectively (2 = 6.78, P = 0.009).
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

This study was conducted to determine the pregnancy rate in response to two sexual synchronization protocols in 70 healthy multiparous Fleckvieh dairy cows during the cold and warm seasons. After pairing by the actual parturition date [cold seasons (-38 to 0 ºC) (Nov - Feb) vs. warm seasons (0 to 32 ºC) (Mar-Oct)], cows were randomly subjected to either Co-Synch (CoS) or double PGF2α injection (dPG) on d 35 postpartum. Data were subjected to Chi-Square (2) analysis to determine the pregnancy rate at the first service. Overall pregnancy rates (%) at the first service were 57.1 and 40.0 for Groups CoS and dPG, respectively (2 = 2.03, P = 0.15) and 35.0 and 66.7% during cold and warm seasons, respectively (2 = 6.78, P = 0.009). The protocol effect on the pregnancy rate at the first service was insignificant during cold (2 = 1.17, P = 0.28) and warm (2 = 1.62, P = 0.20) season. In summary, the cold conditions negatively affected the pregnancy rate at the first service. The synchronization protocol methods did not differ to improve the pregnancy rate at the first service when cows were exposed to cold conditions.

Özet

Bu çalışma, soğuk ve ılık mevsimlerde 70 adet sağlıklı Fleckvieh sütçü ineklere uygulanan iki seksüel senkronizasyon programı sonrası gebelik oranlarını değerlendirmek amacıyla gerçekleştirildi. Doğum sonrası 35. günde, inekler gerçek doğum tarihine göre eşleştirdikten sonra [soğuk mevsim (-38 to 0 ºC) (Kasım - Şubat), ılık mevsim (0 to 32 ºC) (Mart - Ekim)], Co-Synch (CoS) veya çift doz PGF2α enjeksiyon (dPG) protokol gruplarına rastgele dağıtıldı. İlk tohumlamada gebelik oranının belirlenmesi için 2 analizi uygulandı. İlk tohumlamada toplam gebelik oranı, sırasıyla Grup CoS ve dPG için , 57,1 ve 40,0 (2 = 2,03, P = 0,15) ve soğuk ve sıcak mevsimler için % 35,0 ve 66,7 (2 = 6,78, P = 0,009) olarak bulundu. Soğuk (2 = 1.17, P = 0,28) ve sıcak mevsimler (2 = 1,62, P = 0,20) için ilk tohumlamada gebelik oranı üzerine protokol etkisi belirgin değildi. Özetle, soğuk şartlar ilk tohumlamada gebelik oranını olumsuz etkiledi. İnekler soğuk şartlara maruz bırakıldığında senkronizasyon protokolüne bağlı olarak gebelik oranı değişmedi.

🔖

Cite This Article

BALLİ, B., CENGİZ, M., HAYIRLI, A. (2022). The negative effects of cold conditions on pregnancy rates in dairy cows. Ankara Üniversitesi Veteriner Fakültesi Dergisi, Cilt: 69 - Sayı: 1, 77–82. https://ajindex.com/articles/444382

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (16)

  1. Akbarabadi MA, Shabankareh HK, Abdolmohammadi A, et al (2014): Effect of PGF 2α and GnRH on the reproductive performance of postpartum dairy cows subjected to synchronization of ovulation and timed artificial insemination during the warm or cold periods of the year. Theriogenology, 82, 509-516
  2. Alnimer M, De Rosa G, Grasso F, et al (2002): Effect of climate on the response to three oestrous synchronisation techniques in lactating dairy cows. Anim Reprod Sci, 71, 157-168
  3. Amiridis G, Belibasaki S, Leontides L, et al (2000): Reproductive efficiency of three estrus synchronization schemes comprising fixed-time insemination in dairy cows. J Vet Med B, 47, 271-276
  4. Brouček J, Letkovičová M, Kovalčuj K (1991): Estimation of cold stress effect on dairy cows. Int J Biometeorol, 35, 29-32
  5. Bryant JR, Lopez-Villalobos N, Pryce JE, et al (2007): Quantifying the effect of thermal environment on production traits in three breeds of dairy cattle in New Zealand. New Zeal J Agr Res, 50, 327-338
  6. Butler WR (2000): Nutritional interactions with reproductive performance in dairy cattle. Anim Reprod Sci, 60, 449-457
  7. Cerri RLA, Chebel RC, Rivera F, et al (2011): Concentration of progesterone during the development of the ovulatory follicle: I. Ovarian and embryonic responses. J Dairy Sci, 94, 3342-3351
  8. Chebel RC, Braga FA, Dalton JC (2007): Factors affecting reproductive performance of Holstein heifers. Anim Reprod Sci, 101, 208-224
  9. Coubrough RI (1985): Stress and fertility. A review. Onderstepoort J Vet Res, 52, 153-156
  10. De Rensis F, Garcia-Ispierto I, López-Gatius F (2015): Seasonal heat stress: Clinical implications and hormone treatments for the fertility of dairy cows. Theriogenology, 84, 659-666
  11. Dobson H, Smith RF (2000): What is stress, and how does it affect reproduction? Anim Reprod Sci, 60, 743-752
  12. Graunke KL, Schuster T, Lidfors LM (2011): Influence of weather on the behaviour of outdoor-wintered beef cattle in Scandinavia. Livest Sci, 136, 247-255
  13. Gwazdauskas F, Lineweaver J, McGilliard M (1983): Environmental and management factors affecting estrous activity in dairy cattle. J Dairy Sci, 66, 1510-1514
  14. Gwazdauskas F (1985): Effects of climate on reproduction in cattle J Dairy Sci, 68, 1568-1578
  15. Hansen P, Arechiga C (1999): Strategies for managing reproduction in the heat-stressed dairy cow. J Anim Sci, 77, 36-50
  16. Janský L (1984): Thermoregulatory responses to cold stress of various intensity. Arch Exp V