Abstract

This study was carried out by selecting a total number of 17 Holstein Friesian cows divided into two main groups, the first group (4) cows as donors used to take the embryos from after artificial insemination and the second group (13) heifers cows as recipients for embryos. The same techniques were used on donor and recipient cows for the purpose of hormonal preparation in terms of instance synchronization, preparing recipient cows and superovulation for donor cows. Artificial insemination were done in field, and a nonsurgical flushing procedure embryos applied then graded. Donors reflected a good response to superovulation hormonal treatment. The total number of transferable embryos was 13 from four donors. Evaluation of all embryos was excellent quality. The pregnancy rate results for recipient cows was 61.5%. This result is an acceptable as compared to previous studies due to many factors, the study aim was taking into account all these factors, that can have an influence on these programs to obtain genetically improved animals in a shorter time and lower costs.

Highlights

  • Many studies have been carried out to improve the reproduction in domestic animals

  • Multiple ovulation and embryo transfer is one of Assisted Reproductive Techniques (ART), that have been widely applied in different animal species

  • Multiple ovulation and embryo transfer (MOET) is used as a technique to decrease the negative effects of heat stress on fertility and pregnancy rate after embryo transfer in dairy cow recipients [3].The use of MOET scheme has been reported for many years; in particular it has been used on dams of bulls in order to be used in artificial insemination (AI) procedures[4]

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Summary

Introduction

Many studies have been carried out to improve the reproduction in domestic animals. MOET is used as a technique to decrease the negative effects of heat stress on fertility and pregnancy rate after embryo transfer in dairy cow recipients [3].The use of MOET scheme has been reported for many years; in particular it has been used on dams of bulls in order to be used in artificial insemination (AI) procedures[4]. That MOET can increase the selection intensity between cows in order to get the desired donor animals. The rate of genetic improvement and selection intensity of females can be increased by the use of MOET scheme for potential reproductive increase. The reason behind using multiple ovulation and embryo transfer (MOET) programs in cattle is to obtain the successful production of offspring from cattle with high genetic merit. The study aimed to show the influence of different factors on MOET programs

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