TY  - CONF
AU  - Maletić, Milan
AU  - Blagojević, Jovan
AU  - Vakanjac, Slobodanka
AU  - Stanišić, Ljubodrag
AU  - Magaš, Vladimir
AU  - Đurić, Miloje
AU  - Radinović, Miodrag
AU  - Đorđević, Milan
PY  - 2023
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/3278
AB  - Fiziologija mlečnih krava kao i mnogi egzogeni i endogeni faktori utiču na
ekspresiju spoljašnjih znakova estrusa, a uz loš menadžment stada i neobučeno osoblje stopa detekcije estrusa je vrlo često ispod 50%. Ekonomska održivost
proizvodnje u direktnoj je korelaciji sa reproduktivnom efikasnošću. Skraćenje
međutelidbenog intervala uz optimalnu proizvodnju mleka je prioritet na farmama
mlečnih krava. Pravovremena detekcija estrusa je preduslov dobre reprodukcije,
pri čemu primena hormonskih protokola sa fiksnim osemenjavanjem predstavlja
dobru alternativu detekciji estrusa. Na velikim farmskim sistemima u intenzivnoj
proizvodnji mlečnih krava gde je uočavanje estrusa otežano, uvođenje protokola za sinhronizaciju estrusa i ovulacije, kao i protokola resinhronizacije za drugo i
ostala osemenjavanja omogućavaju dobro upravljanje stadom, smanjenja indeksa osemenjavanja, skraćenja međutelidbenog intervala i racionalno poslovanje
farme. Sa tim u vezi u ovom radu predstavićemo najčešće korišćene protokole resinhronizacije estrusa i ovulacije i njihovu uspešnost kod krava koje su predhodno
jednom ili više puta osemenjene.
PB  - Beograd : Fakultet veterinarske medicine, Centar za izdavačku delatnost i promet učila
C3  - 14. Naučni simpozijum Reprodukcija životinja, Divčibare, 12 - 15. oktobar 2023
T1  - Uspešnost primene protokola resinhronizacije estrusa i ovulacije kod krava
SP  - 21
EP  - 30
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_3278
ER  - 

@conference{
author = "Maletić, Milan and Blagojević, Jovan and Vakanjac, Slobodanka and Stanišić, Ljubodrag and Magaš, Vladimir and Đurić, Miloje and Radinović, Miodrag and Đorđević, Milan",
year = "2023",
abstract = "Fiziologija mlečnih krava kao i mnogi egzogeni i endogeni faktori utiču na
ekspresiju spoljašnjih znakova estrusa, a uz loš menadžment stada i neobučeno osoblje stopa detekcije estrusa je vrlo često ispod 50%. Ekonomska održivost
proizvodnje u direktnoj je korelaciji sa reproduktivnom efikasnošću. Skraćenje
međutelidbenog intervala uz optimalnu proizvodnju mleka je prioritet na farmama
mlečnih krava. Pravovremena detekcija estrusa je preduslov dobre reprodukcije,
pri čemu primena hormonskih protokola sa fiksnim osemenjavanjem predstavlja
dobru alternativu detekciji estrusa. Na velikim farmskim sistemima u intenzivnoj
proizvodnji mlečnih krava gde je uočavanje estrusa otežano, uvođenje protokola za sinhronizaciju estrusa i ovulacije, kao i protokola resinhronizacije za drugo i
ostala osemenjavanja omogućavaju dobro upravljanje stadom, smanjenja indeksa osemenjavanja, skraćenja međutelidbenog intervala i racionalno poslovanje
farme. Sa tim u vezi u ovom radu predstavićemo najčešće korišćene protokole resinhronizacije estrusa i ovulacije i njihovu uspešnost kod krava koje su predhodno
jednom ili više puta osemenjene.",
publisher = "Beograd : Fakultet veterinarske medicine, Centar za izdavačku delatnost i promet učila",
journal = "14. Naučni simpozijum Reprodukcija životinja, Divčibare, 12 - 15. oktobar 2023",
title = "Uspešnost primene protokola resinhronizacije estrusa i ovulacije kod krava",
pages = "21-30",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_3278"
}

Maletić, M., Blagojević, J., Vakanjac, S., Stanišić, L., Magaš, V., Đurić, M., Radinović, M.,& Đorđević, M.. (2023). Uspešnost primene protokola resinhronizacije estrusa i ovulacije kod krava. in 14. Naučni simpozijum Reprodukcija životinja, Divčibare, 12 - 15. oktobar 2023
Beograd : Fakultet veterinarske medicine, Centar za izdavačku delatnost i promet učila., 21-30.
https://hdl.handle.net/21.15107/rcub_veterinar_3278

Maletić M, Blagojević J, Vakanjac S, Stanišić L, Magaš V, Đurić M, Radinović M, Đorđević M. Uspešnost primene protokola resinhronizacije estrusa i ovulacije kod krava. in 14. Naučni simpozijum Reprodukcija životinja, Divčibare, 12 - 15. oktobar 2023. 2023;:21-30.
https://hdl.handle.net/21.15107/rcub_veterinar_3278 .

Maletić, Milan, Blagojević, Jovan, Vakanjac, Slobodanka, Stanišić, Ljubodrag, Magaš, Vladimir, Đurić, Miloje, Radinović, Miodrag, Đorđević, Milan, "Uspešnost primene protokola resinhronizacije estrusa i ovulacije kod krava" in 14. Naučni simpozijum Reprodukcija životinja, Divčibare, 12 - 15. oktobar 2023 (2023):21-30,
https://hdl.handle.net/21.15107/rcub_veterinar_3278 .

TY  - JOUR
AU  - Đorđević, Milan
AU  - Blagojević, Jovan
AU  - Radinović, Miodrag
AU  - Cincović, Marko
AU  - Maletić, Jelena
AU  - Kreszinger, Mario
AU  - Maletić, Milan
PY  - 2022
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2832
AB  - The reproductive efficiency of the cows was monitored after two resynchronization protocols: Ovsynch (OVS) and Double Ovsynch (DOS). The research initially included 70 HF cows who entered the first synchronization protocol - Presynch. Cows that did not conceive after the first synchronization were divided into two groups and introduced to two resynchronization protocols. In the first group of cows (n=35), the DOS protocol began with the application of GnRH on day 22 after the Presynch TAI (Timed Artificial Insemination), and seven days later pregnancy check-up was done and PGF2α was applied only to non-pregnant cows (n=23), which remained in the study. In the second group of cows, the OVS protocol started on day 32 after Presynch TAI only in non-pregnant animals (n=20). Progesterone (P4) concentration was determined at the time of application of GnRH1, PGF2α and GnRH2 in both groups of cows, and then 30 days after Resynch TAI, ultrasound pregnancy diagnosis was done. A higher percentage of pregnant cows were recorded in the OVS group compared to the DOS group (45% and 35%, respectively). The concentration of P4 in the serum of cows in the DOS group during the first measurement (GnRH1) was significantly higher than the value in cows that did not conceive (p<0.05), while in the third measurement (GnRH2) the average concentration of P4 in conceiving cows was significantly lower (p<0.001) compared to cows that did not coincive. The open days period was significantly longer in pregnant cows that were resynchronized using the DOS protocol compared to cows from the OVS protocol. In conclusion, the OVS protocol of estrus resynchronization in dairy cows proved to be more successful than the DOS protocol. However, considering the advantages the OVS, it is needed to determine which day of the sexual cycle is the best to start resynchronization.
PB  - Sciendo
T2  - Acta Veterinaria
T1  - Efficiency of two protocols of resynchronization of estrus and ovulation in high-producing dairy cows at peak lactation
VL  - 72
VL  - 3
SP  - 362
SP  - 374
DO  - 10.2478/acve-2022-0029
ER  - 

@article{
author = "Đorđević, Milan and Blagojević, Jovan and Radinović, Miodrag and Cincović, Marko and Maletić, Jelena and Kreszinger, Mario and Maletić, Milan",
year = "2022",
abstract = "The reproductive efficiency of the cows was monitored after two resynchronization protocols: Ovsynch (OVS) and Double Ovsynch (DOS). The research initially included 70 HF cows who entered the first synchronization protocol - Presynch. Cows that did not conceive after the first synchronization were divided into two groups and introduced to two resynchronization protocols. In the first group of cows (n=35), the DOS protocol began with the application of GnRH on day 22 after the Presynch TAI (Timed Artificial Insemination), and seven days later pregnancy check-up was done and PGF2α was applied only to non-pregnant cows (n=23), which remained in the study. In the second group of cows, the OVS protocol started on day 32 after Presynch TAI only in non-pregnant animals (n=20). Progesterone (P4) concentration was determined at the time of application of GnRH1, PGF2α and GnRH2 in both groups of cows, and then 30 days after Resynch TAI, ultrasound pregnancy diagnosis was done. A higher percentage of pregnant cows were recorded in the OVS group compared to the DOS group (45% and 35%, respectively). The concentration of P4 in the serum of cows in the DOS group during the first measurement (GnRH1) was significantly higher than the value in cows that did not conceive (p<0.05), while in the third measurement (GnRH2) the average concentration of P4 in conceiving cows was significantly lower (p<0.001) compared to cows that did not coincive. The open days period was significantly longer in pregnant cows that were resynchronized using the DOS protocol compared to cows from the OVS protocol. In conclusion, the OVS protocol of estrus resynchronization in dairy cows proved to be more successful than the DOS protocol. However, considering the advantages the OVS, it is needed to determine which day of the sexual cycle is the best to start resynchronization.",
publisher = "Sciendo",
journal = "Acta Veterinaria",
title = "Efficiency of two protocols of resynchronization of estrus and ovulation in high-producing dairy cows at peak lactation",
volume = "72, 3",
pages = "362-374",
doi = "10.2478/acve-2022-0029"
}

Đorđević, M., Blagojević, J., Radinović, M., Cincović, M., Maletić, J., Kreszinger, M.,& Maletić, M.. (2022). Efficiency of two protocols of resynchronization of estrus and ovulation in high-producing dairy cows at peak lactation. in Acta Veterinaria
Sciendo., 72, 362.
https://doi.org/10.2478/acve-2022-0029

Đorđević M, Blagojević J, Radinović M, Cincović M, Maletić J, Kreszinger M, Maletić M. Efficiency of two protocols of resynchronization of estrus and ovulation in high-producing dairy cows at peak lactation. in Acta Veterinaria. 2022;72:362.
doi:10.2478/acve-2022-0029 .

Đorđević, Milan, Blagojević, Jovan, Radinović, Miodrag, Cincović, Marko, Maletić, Jelena, Kreszinger, Mario, Maletić, Milan, "Efficiency of two protocols of resynchronization of estrus and ovulation in high-producing dairy cows at peak lactation" in Acta Veterinaria, 72 (2022):362,
https://doi.org/10.2478/acve-2022-0029 . .