PMID: 1195242Oct 1, 1975Paper

Experiments on egg transfer in the cow and ewe: dependence of conception rate on the transfer procedure and stage of the oestrous cycle

Journal of Reproduction and Fertility
R A LawsonH R Tervit

Abstract

The effects on embryo survival of procedures used in transferring eggs non-surgically were investigated in three experiments in ewes and heifers. In Exp. 1, two techniques for introducing eggs into the uterus through the cervix in heifers were compared; namely (i) deposition of the eggs high into the uterine horn or (ii) into the body of the uterus. Both methods were followed by inflation of the uterus with carbon dioxide. Out of a total of 34 heifers, only one became pregnant by the use of Method (i). Non-surgical egg tansfers early (Days 3 to 5) or later (Days 6 to 9) in the oestrous cycles of heifers were carried out in Exp. 2. Three transfer procedures were compared: (i) pipette transfer of an egg into the body of the uterus through the cervix (control), (ii) the control procedure performed under Fluothane anaesthesia, or (iii) followed by inflation of the uterus with carbon dioxide. Wide transfers carried out early in the cycle, pregnancies resulted in 1/10, 0/10 and 1/10 of the heifers in the control, carbon dioxide and Fluothane groups, respectively. With late transfers, 7/20, 1/10 and 8/20 heifers became pregnant in the respective treatment groups. This trend for pregnancy rate to be improved when late transfers were do...Continue Reading

Citations

Apr 1, 1977·Theriogenology·J P RenardF du Mesnil du Buisson
Jul 1, 1978·Theriogenology·J M BowenG E Seidel
Nov 1, 1978·New Zealand Veterinary Journal·D P Mashall, G A Struthers
May 1, 1983·New Zealand Veterinary Journal·H R TervitD J Clarkson
Dec 17, 2008·Reproduction : the Official Journal of the Society for the Study of Fertility·Sandra Wilsher, W R Allen
Oct 7, 2017·Reproduction : the Official Journal of the Society for the Study of Fertility·Alan D Ealy, Lydia K Wooldridge

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