Embryo transfer in fallow deer (Dama dama ): Superovulation, embryo recovery and laparoscopic transfer of fresh and cryopreserved embryos.

Embryo transfer in fallow deer (Dama dama ): Superovulation, embryo recovery and laparoscopic transfer of fresh and cryopreserved embryos. Research Abstract Details 

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Embryo transfer in fallow deer (Dama dama ): Superovulation, embryo recovery and laparoscopic transfer of fresh and cryopreserved embryos. Abstract Text:

C J Morrow,G W Asher,D K Berg,H R Tervit,P A Pugh,W H McMillan,S Beaumont,D R Hall,A C Bell,

Multiple ovulation-embryo transfer (MOET) protocols for farmed fallow deer (Dama dama ) were investigated in a series of 3 experiments. A total of 37 donors, of either European (D.d. dama ; n = 30) or Mesopotamian hybrid (D.d. mesopotamica x D.d. dama ; n =7) genotype, each received an intravaginal silastic device containing 0.3 g progesterone (CIDR((R))-type G device) for 14 d and injections of 0.5 units ovine FSH (8 x 0.06 unit injections from Days 10 to 14 of device insertion) and 100 IU PMSG (either with the first or last FSH injection). All donors received laparoscopic intrauterine inseminations of fresh semen (50 x 10(6) spermatozoa) from a Mesopotamian sire 36 h after withdrawal of CIDR((R)) devices. Embryos were recovered by laparotomy on Day 6 (Day 0 = estrus). Mean ovulation rates for the 3 experiments were 8.1, 9.8 and 7.0, with no effect of PMSG timing (P>0.10). However, embryo recovery rates, albeit low throughout the study (29.6%), were significantly improved with later PMSG administration (33.9 vs 20.1%; P<0.05). Hybrid and European donors performed in a similar manner. A range of embryo development stages was recovered throughout the study. In 2 experiments laparoscopic transfer of embryos to 48 recipient does treated previously with intravaginal CIDR((R)) devices for 14 d yielded a total pregnancy rate of 37.5%. In the experiment with fresh embryos, the use of clenbuterol to reduce uterine turgidity resulted in a higher proportion of does conceiving (3 4 ; 75%) compared with that of the untreated does (0 6 , 0%; P<0.05). In the second experiment, in which all the does routinely received clenbuterol, 10 19 (53%) and 5 19 (26%) does conceived following the transfer of fresh and cryopreserved embryos, respectively (P<0.05). While the overall efficiency of the MOET program was low (equivalent of 0.9 to 1.0 surrogate pregnancies per donor), improvements in the recovery rate of transferable embryos have considerable potential for genetic improvement of farm stock and captive propagation of endangered Mesopotamian fallow deer through maternal surrogacy programs.

Embryo transfer in fallow deer (Dama dama ): Superovulation, embryo recovery and laparoscopic transfer of fresh and cryopreserved embryos. Publishing Authors By Initials

CJ Morrow,GW Asher,DK Berg,HR Tervit,PA Pugh,WH McMillan,S Beaumont,DR Hall,AC Bell,

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Embryo transfer in fallow deer (Dama dama ): Superovulation, embryo recovery and laparoscopic transfer of fresh and cryopreserved embryos. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Theriogenology

VOLUME: 42

Page Numbers: 579-90

Journal Abbreviation: Theriogenology

ISSN: 0093-691X

DAY: 26

MONTH: Sep

YEAR: 1994

Embryo transfer in fallow deer (Dama dama ): Superovulation, embryo recovery and laparoscopic transfer of fresh and cryopreserved embryos. Information

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LANGUAGE: eng

NlmUniqueID: 421510

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AFFILIATION: New Zealand Pastoral Agriculture Research Institute (AgResearch), Ruakura Agricultural Center, Private Bag 3123, Hamilton, New Zealand; National Zoological Park, Conservation and Research Center, Smithsonian Institution Front Royal, VA 22630 USA.

Country: United States

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MEDLINETA: Theriogenology

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