Erken gebe sütçü ineklerde beta karoten ve gnrh enjeksiyonlarından sonra luteal kan akışı ve luteal büyüklükteki değişiklikler

Sunulan çalışmada erken gebe ineklere kas içi yapılan beta-karoten (?C) ve GnRH enjeksiyonlarının luteal büyüklük (LS), luteal kan akışkanlığı (LBF) ve serum ?C düzeyine etkilerinin belirlenmesi amaçlandı. Olgun korpus luteuma (>19 mm) sahip toplam 29 Holstein-Friesian inek rastgele olarak ?C uygulanmayan (?C-; n=15) ve uygulanan (?C+; n=14) olmak üzere iki gruba ayrıldı. İneklerin hepsi PGF2a uygulamasından 48 ve 72 saat sonra tohumlandı. Son tohumlama günü 0. gün olarak kabul edildi. Tohumlamalar sırasında, ayrıca 7. ve 17. günde tüm hayvanlara GnRH uygulandı. ?C- gruptan farklı olarak ?C+ gruba 7 ve 17. günde ?C kas içi uygulandı. Grupların LS ve LBF ölçümleri 7, 10, 17, 27 ve 37. günlerde rektal yolla B-mod ve renkli Doppler ultasonografi ile gerçekleştirildi. Her bir uygulama gününde kan örnekleri toplandı. Tohumlamalar sonucunda gebe olan inekler istatistiksel değerlendirmede kullanıldı. Serum ?C düzeyi ?C+ grupta, 17. gün hariç, ?C- gruptan yüksek bulundu (P0.05). LS ve LBF değerlerinin ?C+ grupta 7. (P<0.05) ve 27. günlerde (P<0.01) ?C- gruptan daha yüksek olduğu ve 37. güne kadar önemli düzeyde artarak devam ettiği belirlendi (LS: P<0.05, LBF: P<0.01). Sonuç olarak ?C enjeksiyonlarının serum ?C konsantrasyonunu, LS ve LBF’yi önemli derece yükselttiği belirlendi.The aim of this study was to determine the effectiveness of intramuscular injections of beta-carotene (&amp;#946;C) and GnRH on luteal size (LS), luteal blood flow (LBF) and serum &amp;#946;C concentrations in early pregnant cows. Twenty-nine Holstein-Friesian cows with a mature corpus luteum (&gt;19mm) were randomly assigned to two groups: &amp;#946;C not received (&amp;#946;C-; n=15) or received (&amp;#946;C+; n=14). All cows were treated with PGF2a and inseminated twice, 48 and 72h after the treatment. Last AI was considered to be day 0. All cows received GnRH on day inseminations, 7 and 17. Different from the &amp;#946;C-, the &amp;#946;C+ group received &amp;#946;C intramuscularly on day 7 and 17. In both groups, measurement of LS and LBF were performed on days 7, 10, 17, 27 and 37 by transrectal B-mode and colour Doppler ultrasonography. Blood samples were collected on each examination day. Only cows that became pregnant were included in the statistical evaluation. The concentration of &amp;#946;C in the &amp;#946;C+ group was higher than in the &amp;#946;C- at all examination days except day 17 (P&lt;0.05). There was no significant difference between groups concerning the progesterone concentrations (P&gt;0.05). The LS and LBF of &amp;#946;C+ group on day 7 (P&lt;0.05) and 27 (P&lt;0.01) was higher than in the &amp;#946;C- group and values increased significantly until day 37 (LS: P&lt;0.05, LBF: P&lt;0.01). We conclude that &amp;#946;C injections significantly increased serum &amp;#946;C concentrations, as well as LS and LBF

The Change in Luteal Blood Flow and Luteal Size after Beta Carotene and GnRH Injections in Early Pregnant Dairy Cows

The aim of this study was to determine the effectiveness of intramuscular injections of beta-carotene (βC) and GnRH on luteal size (LS), luteal blood flow (LBF) and serum βC concentrations in early pregnant cows. Twenty-nine Holstein-Friesian cows with a mature corpus luteum (&gt;19mm) were randomly assigned to two groups: βC not received (βC-; n=15) or received (βC+; n=14). All cows were treated with PGF2α and inseminated twice, 48 and 72h after the treatment. Last AI was considered to be day 0. All cows received GnRH on day inseminations, 7 and 17. Different from the βC-, the βC+ group received βC intramuscularly on day 7 and 17. In both groups, measurement of LS and LBF were performed on days 7, 10, 17, 27 and 37 by transrectal B-mode and colour Doppler ultrasonography. Blood samples were collected on each examination day. Only cows that became pregnant were included in the statistical evaluation. The concentration of βC in the βC+ group was higher than in the βC- at all examination days except day 17 (P&lt;0.05). There was no significant difference between groups concerning the progesterone concentrations (P&gt;0.05). The LS and LBF of βC+ group on day 7 (P&lt;0.05) and 27 (P&lt;0.01) was higher than in the βC- group and values increased significantly until day 37 (LS: P&lt;0.05, LBF: P&lt;0.01). We conclude that βC injections significantly increased serum βC concentrations, as well as LS and LBF.</p