Comparison of synchronisation and fertility after different modifications of the ovsynch protocol in cyclic dairy cows
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Tartalom: http://real.mtak.hu/49753/
Archívum: MTA Könyvtár
Gyűjtemény: Status = Published
Type = Article
Cím:
Comparison of synchronisation and fertility after different modifications of the ovsynch protocol in cyclic dairy cows
Létrehozó:
Yilmazbas-Mecitoglu, Gulnaz
Karakaya, Ebru
Keskin, Abdulkadir
Gumen, Ahmet
Koc, Volkan
Okut, Hayrettin
Kiadó:
AkadĂŠmiai KiadĂł
Dátum:
2014
Téma:
SV Veterinary science / ĂĄllatorvostudomĂĄny
Tartalmi leírás:
The objectives of this study were to evaluate the effects of (1) double doses of PGF<sub>2α</sub> administration or (2) an exogenous progesterone (CIDR) applied concurrently with, or (3) the day after, first GnRH of Ovsynch (GnRH-1), on synchronisation and fertility during the Ovsynch protocol. All cows (n = 378) received the Ovsynch protocol (GnRH-7d-PGF2α-56h-GnRH-18h-TAI). The ‘OVS’ group (n = 105) received only the Ovsynch protocol. The ‘OVS-PGF’ group (n = 118, GnRH-7d-PGF2α-12h-PGF2α-44h-GnRH-18h-TAI) received an extra dose of PGF2α 12 h later on Day 7. The ‘OVS-7CIDR’ group (n = 78, GnRH+CIDR-7d-PGF2α-56h-GnRH-18h-TAI) received a CIDR for 7 days between GnRH-1 and PGF<sub>2α</sub>. In the ‘OVS-6CIDR’ group (n = 77, GnRH-24h-CIDR-6d-PGF2α-56h-GnRH-18h-TAI), CIDR was applied one day after GnRH-1 and removed 6 days later. When all cows were evaluated, the responses to GnRH-2 were higher (P = 0.005) in cows that responded to GnRH-1 (95.4%) compared to the cows that did not respond (87.6%). The pregnancy rates at 31 and 62 days for each group were 48.6% and 42.9% in the OVS, 54.2% and 52.5% in the OVS-PGF, 52.6% and 48.7% in the OVS-7CIDR, and 55.8% and 49.3% in the OVS-6CIDR groups. Thus, none of the three different treatments has an effect on increasing the out-comes of the Ovsynch protocol in cyclic lactating dairy cows.
Nyelv:
magyar
Típus:
Article
PeerReviewed
info:eu-repo/semantics/article
Formátum:
text
Azonosító:
Yilmazbas-Mecitoglu, Gulnaz and Karakaya, Ebru and Keskin, Abdulkadir and Gumen, Ahmet and Koc, Volkan and Okut, Hayrettin (2014) Comparison of synchronisation and fertility after different modifications of the ovsynch protocol in cyclic dairy cows. Acta Veterinaria Hungarica, 62 (1). pp. 64-73. ISSN 0236-6290
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