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Ovarian response to P4-PGF-FSH treatment in Suffolk sheep and P4-PGF-PMSG synchronization in cross-bred ewes,for IVD and ET protocol

Show simple item record Ciornei, Ştefan-Gregore Drugociu, Dan Ciornei, Liliana Roşca, Petru 2023-05-18T06:53:59Z 2023-05-18T06:53:59Z 2022-01-17
dc.identifier.citation Ciornei, Ş. G., Drugociu, D., Ciornei, L., Roşca, P. 2022. "Ovarian response to P4-PGF-FSH treatment in Suffolk sheep and P4-PGF-PMSG synchronization in cross-bred ewes, for IVD and ET protocol". Veterinary Medicine and Science 8, no.2: 726– 734. en_US
dc.description.abstract Background The success of an embryo transfer protocol in sheep depends on many factors, but the choice of drugs for the desired superovulation as well as the conception rate (CR) are most essential. Reproductive activity in sheep is characterized by a seasonality influenced by several factors such as photoperiod, latitude, temperature, nutrition and breed. Reproductive seasonality and nutritional condition are the main factors that influence embryo production in sheep. In sheep, some anatomical peculiarities limit the application of traditional reproductive biotechnologies used in cattle. Objectives The aim of this study was to conclude on the effectiveness of a wider on farm in vivo embryo transfer development programme in Suffolk sheep by streamlining hormone therapies and optimizing technique. Methods A total number of 60 sheep and three rams were included in this study, divided into two groups (receptors and donors). Donor Suffolk sheep were treated for superovulation using the P4-PGF-FSH multiple ovulation embryo transfer (MOET) protocol, while the cross-bred recipients’ group was synchronized with P4-PGF-PMSG. Results On the first day after superovulation, all ovaries had more than five dominant follicles, while corpora lutea were later observed in 83.3% sheep. The recovery rate was 83.3%, while 72.9% embryos were transferable. Embryos were transferred directly into recipients. Fertility after 30 days was 68.57%, lambing rate was 91.6% and CR was 62.85%. This study showed that veterinary drugs (P4, FSH, LH, PMSG, PGF) used for superovulation optimized by us were capable of producing by this improved technique the optimization of the reproduction indices at embryo-transfer (ET) and to be able to be used successfully. Conclusions The application of an MOET protocol has a positive effect in the production of in vivo embryo production (IVD) embryos in Suffolk sheep and can guarantee the success of embryo transfer activity to ewes with lower genetic merit. Our research aimed at representing a model for sheep farms for a rapid improvement of productive traits. en_US
dc.language.iso en en_US
dc.publisher Wiley Open Access en_US
dc.rights CC BY 4.0
dc.subject embryo transfer en_US
dc.subject MOET en_US
dc.subject hormones en_US
dc.subject sheep en_US
dc.subject superovulation en_US
dc.title Ovarian response to P4-PGF-FSH treatment in Suffolk sheep and P4-PGF-PMSG synchronization in cross-bred ewes,for IVD and ET protocol en_US
dc.type Article en_US Ştefan Gregore Ciornei, Dan Drugociu, Liliana Ciornei, Petru Roşca, Faculty of Veterinary Medicine, Department of Clinics, Reproduction, Iasi University of Life Sciences (IULS), Iasi, Romania
dc.publicationName Veterinary Medicine and Science
dc.volume 8
dc.issue 2
dc.publicationDate 2022
dc.startingPage 726
dc.endingPage 734
dc.identifier.eissn 2053-1095

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