The aim of this study was to optimize the treatment for oestrus synchronization based on PRID+PMSG+PGF in Italian Mediterranean buffaloes in order to apply AI. The animals (n=93) at 160.8±114.3 days of lactation were divided in two homogeneous groups and a progesterone releasing intravaginal device (PRID) was inserted for 10 days in all subjects. Buffaloes in Group A (n=47) received an i.m. injection of 1000 IU of PMSG and 0.15 mg of cloprostenol on day 7 (Day 0= day of PRID insertion), whereas animals in Group B (n=46) received the same injections of PMSG and PGF on day 10 (day of PRID removal). The AI was carried out at 72 and 96 hours after PRID removal using frozen/thawed semen of progeny test bulls. The pregnancy diagnosis was performed on day 26 after the first AI by an ultrasound sector scanner with a 7.5 Mhz rectal linear probe and confirmed by a gynaecologic visit on day 45. The data were analysed by chi square test. No significant differences were observed in terms of pregnancy rate on day 26 between the groups (48.9% and 32.6% respectively in group A and B). On the contrary, a significant (P<0.01) difference was recorded on day 45 (44.7 and 21.3 respectively in group A and B). It can be concluded that the early administration of PMSG and PGF improves pregnancy rate in buffalo cows.
Prostaglandin and PMSG administration at different times during an estrus synchronization protocol in buffalo / Barile, V. L.; Allegrini, S.; Maschio, M.; DE SANTIS, G.; Neglia, Gianluca; Borghese, A.. - In: REPRODUCTION IN DOMESTIC ANIMALS. - ISSN 0936-6768. - STAMPA. - 41:(2006), pp. 345-345.
Prostaglandin and PMSG administration at different times during an estrus synchronization protocol in buffalo.
NEGLIA, GIANLUCA;
2006
Abstract
The aim of this study was to optimize the treatment for oestrus synchronization based on PRID+PMSG+PGF in Italian Mediterranean buffaloes in order to apply AI. The animals (n=93) at 160.8±114.3 days of lactation were divided in two homogeneous groups and a progesterone releasing intravaginal device (PRID) was inserted for 10 days in all subjects. Buffaloes in Group A (n=47) received an i.m. injection of 1000 IU of PMSG and 0.15 mg of cloprostenol on day 7 (Day 0= day of PRID insertion), whereas animals in Group B (n=46) received the same injections of PMSG and PGF on day 10 (day of PRID removal). The AI was carried out at 72 and 96 hours after PRID removal using frozen/thawed semen of progeny test bulls. The pregnancy diagnosis was performed on day 26 after the first AI by an ultrasound sector scanner with a 7.5 Mhz rectal linear probe and confirmed by a gynaecologic visit on day 45. The data were analysed by chi square test. No significant differences were observed in terms of pregnancy rate on day 26 between the groups (48.9% and 32.6% respectively in group A and B). On the contrary, a significant (P<0.01) difference was recorded on day 45 (44.7 and 21.3 respectively in group A and B). It can be concluded that the early administration of PMSG and PGF improves pregnancy rate in buffalo cows.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
