Effects of body condition score on fertility and some reproductive performance in holstein dairy cows

Abstract

This study conducted to evaluate the effects of body condition score at artificial insemination (AI) on fertility and some reproductive performance. In this study, the total of 110 Holstein cows at different body condition score (BCS) were used. The cows in oestrus were fertilized by artificial insemination. The diameters of preovulatory follicles were determined using ultrasound. In addition, serum progesterone levels were determined. The pregnancy diagnosis in cows was performed using ultrasound at 30-40 days after insemination. Initially, the rates of pregnancy following insemination were 26.6, 34.2, 43.3, 45.0 and 42.8 %, in the 1.5, 2.0, 2.5, 3.0, ≥ 3.5 BCS groups (p>0.05) whereas the index of insemination and pregnancy were 2.79 and 3.07. Average of postpartum – first insemination time (day) was 85.05 and at 1.5, 2.0, 2.5, 3.0, ≥3.5 body condition score were 95.22, 83.89, 84.00, 91.05, 63.86 (p>0.05). The diameter (cm) of the mean pre-ovulatory follicles were not different in BCS groups, which was found 1.48. In conclusion; Low and high BCS at AI was not associated significantly with postpartum-first insemination time, first insemination pregnancy rate, pregnancy and artificial insemination index

Keywords

• Artificial insemination
• body condition score
• Holstein cow
• fertility
• reproductive parameters

Holştayn ırkı ineklerde vücut kondisyon skorunun fertilite ve bazı reprodüktif parametrelere etkisi

Abstract

Çalışmanın amacı, holştayn ineklerde suni tohumlama dönemindeki vücut kondisyon skorunun (VKS) fertilite ve bazı reprodüktif parametrelere olan etkisinin ortaya konulmasıdır. Çalışmada değişik vücut kondisyonda olan 110 baş Holştayn inek materyal olarak kullanıldı. Östrusa gelmiş ineklere suni tohumlama yapıldı ve vücut kondisyon skoru tespit edildi. Tohumlanan ineklerin, preovulatör follikül çapı ve kan progesteron (P4) düzeyi saptandı. Suni tohumlama sonrası 30-40. günlerde ise gebelik tespiti yapıldı. Araştırmanın sonucuna göre, 1.5, 2.0, 2.5, 3.0 ve ≥3.5 vücut kondisyon skorlu grupların birinci suni tohumlama gebelik oranı (%) sırasıyla 26.6, 34.2, 43.3, 45.0 ve 42.8 dir (p>0.05). Tohumlama indeksi 2.79, gebelik indeksi ise 3.07 dir. Ortalama 85.05 gün olan doğum- ilk tohumlama süresi (gün) ortalama 85.05, VKS 1.5, 2.0, 2.5, 3.0 ve ≥3.5 gruplarında sırasıyla 95.22, 83.89, 84.00, 91.05, 63.86 (p>0.05) dir. Suni tohumlama uygulamalarında ortalama preovulatör follikül çapı 1.48 cm olarak tespit edilirken, VKS grupları arasında istatistiki bir farklılık gözlenmedi (p>0.05). Sonuç olarak, tohumlamada düşük ve yüksek vücut kondisyon skorunun, doğum-suni tohumlama zamanı, gebelik indeksi, tohumlama indeksi ve ilk tohumlama gebelik oranı üzerine istatistiki önemde bir etkisinin olmadığı gözlenmiştir

Keywords

• Holştayn inek
• fertilite
• suni tohumlama
• reprodüktif parametreler
• vücut kondisyon skoru

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