TY  - JOUR
T1  - Effects of Breed and Number of Embryos Transferred on the Efficacy of MOET in Sheep
AU - Swelum, Ayman Abdel-Aziz AU - Al-Owaimer, Abdullah Nasser AU - Abouheif, Mohamed Ahmed 
JO  - Journal of Animal and Veterinary Advances
VL  - 13
IS  - 2
SP  - 98
EP  - 103
PY  - 2014
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2014.98.103
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2014.98.103
KW  - Multiple ovulation
KW  -embryo transfer
KW  -najdi
KW  -naeimi
KW  -sheep
AB  - The present study aimed to evaluate the effect of sheep breed 
  as well as number of embryos transferred on the success of MOET. Sixteen ewes 
  were used as donor (Najdi = 11 and Naeimi = 5). Oestrus synchronization and 
  multiple ovulation were performed using intra-vaginal progesterone sponge and 
  eCG. Donors inseminated intrauterine using laparoscopic. Embryos were recovered 
  and transferred surgically on day 8 after sponge withdrawal. Thirty five ewes 
  (Najdi = 16 and Naeimi = 19) were used as recipients and divided into 4 groups: 
  Najdi or Naeimi received one or two embryos. Pregnancy was diagnosed at day 
  35 post insemination and confirmed at day 60 using ultrasound. All recipients 
  were followed up until lambing thereafter, gestation length, litter size and 
  sex of lambs were recorded. The results revealed that the number of embryos 
  recovered/responded donor was significantly (p<0.05) lower in Najdi (5.1±1.11) 
  than Naeimi (7.6±0.98) sheep. The breed of ewes had a noticeable effects 
  (p<0.05) on the percentages of pregnancy, lambing and embryos survival these 
  said indices were lower (p<0.05) in recipient Najdi than Naeimi ewes when 
  two embryos were transferred. On the other hand, the recipient Naeimi ewes that 
  received one embryo had significant low ET success. Embryos survival rate in 
  Najdi that had one-embryo transferred were higher (p<0.05) than those received 
  two-embryos. In conclusion, the response of ewes for multiple ovulation using 
  eCG was significantly (p<0.05) lower in Najdi (6.7±1.05) than Naeimi 
  (9.8±1.17) ewes. Moreover, transfer of one embryo resulted in significant 
  (p<0.05) higher pregnancy rate in Najdi (60%) than Naeimi (10%) sheep.
ER  -