PMID- 12527074
OWN - NLM
STAT- MEDLINE
DCOM- 20030409
LR  - 20190822
IS  - 0093-691X (Print)
IS  - 0093-691X (Linking)
VI  - 59
IP  - 5-6
DP  - 2003 Mar
TI  - Factors affecting the survival of sheep embryos after transfer within a MOET 
      program.
PG  - 1265-75
AB  - Multiple ovulation and embryo transfer (MOET) has the potential to increase the 
      rate of genetic improvement in sheep. However, better realization of this 
      potential requires maximum survival rates of transferred embryos of high genetic 
      merit after transfer into recipient ewes. These studies were therefore conducted 
      to investigate the effect of both embryonic and recipient ewe factors on the 
      survival rate of transferred embryos. Survival rate was similar after transfer of 
      morula or blastocyst stage embryos, and these were higher (P<0.05) than for very 
      early morulae and early morulae. Advanced embryos (Day 5 blastocyst) had an 
      advantage (P<0.05) in survival rate over retarded embryos (Day 6 morula). Grades 
      1 and 2 embryos survived significantly (P<0.05) better than Grades 3 or 4 
      embryos. There was no difference in embryo survival rate following transfer to 
      recipients with different numbers of corpora lutea. In general, age or parity of 
      recipient ewes did not affect embryo survival rate, although a higher (P<0.05) 
      embryo survival rate was observed for yearling recipients. Buserelin (GnRH 
      agonist) treatment of recipient ewes 5 or 6 days after transfer of embryos (Day 
      12 of the cycle) did not improve embryo survival rate. These results confirm that 
      both embryonic and recipient factors can play an important role in the success of 
      a MOET program in sheep.
FAU - Bari, F
AU  - Bari F
AD  - Institute of Rural Studies, University of Wales Aberystwyth, Llanbadarn Campus, 
      Aberystwyth, Ceredigion SY23 3AL, UK.
FAU - Khalid, M
AU  - Khalid M
FAU - Haresign, W
AU  - Haresign W
FAU - Murray, A
AU  - Murray A
FAU - Merrell, B
AU  - Merrell B
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Theriogenology
JT  - Theriogenology
JID - 0421510
RN  - 0 (Fertility Agents, Female)
RN  - PXW8U3YXDV (Buserelin)
SB  - IM
MH  - Age Factors
MH  - Animals
MH  - Buserelin/pharmacology
MH  - Corpus Luteum/physiology
MH  - Embryo Transfer/*veterinary
MH  - Embryonic and Fetal Development/physiology
MH  - Female
MH  - Fertility Agents, Female/pharmacology
MH  - Fetal Death/*veterinary
MH  - Male
MH  - Pregnancy
MH  - Retrospective Studies
MH  - Sheep/*embryology/physiology
EDAT- 2003/01/16 04:00
MHDA- 2003/04/10 05:00
CRDT- 2003/01/16 04:00
PHST- 2003/01/16 04:00 [pubmed]
PHST- 2003/04/10 05:00 [medline]
PHST- 2003/01/16 04:00 [entrez]
AID - S0093691X02011627 [pii]
AID - 10.1016/s0093-691x(02)01162-7 [doi]
PST - ppublish
SO  - Theriogenology. 2003 Mar;59(5-6):1265-75. doi: 10.1016/s0093-691x(02)01162-7.