J. Anim Sci.
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J. Anim Sci. 1964. 23:37-42.
© 1964 American Society of Animal Science
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Intra-Uterine Migration and Mixing of Embryos in Swine Following Egg Transfer

P. J. Dziuk1,2,, C. Polge and L. E. Rowson3

ARC Unit of Reproductive Physiology and Biochemistry, Cambridge, England

Abstract

Eggs were recovered in vivo in a modified Tyrode's solution from 29 donor gilts and transferred to 27 unmated recipients. Ovulation time of donors and recipients was synchronized. Eggs from B donors were transferred to the left oviduct or upper uterine horn, and eggs from W donors were transferred to the right side in 18 gilts. When the uteri and fetal contents were examined at about 90 days of gestation, migration of one or more eggs from one horn to the other had occurred in all (14) of the pregnant animals. Mixing of embryos from the two different sides occurred in 9 of 11 gilts in which both B and W fetuses survived to examination.

Eggs were transferred to one uterine horn only in nine gilts. Five of these nine were pregnant when examined at 21 days of gestation. Two had embryos in both uterine horns and three had embryos in only one horn.

Of 263 eggs transferred 110 (42%) developed into fetuses. Of 184 eggs transferred to recipient gilts which were pregnant at examination, 60% had developed into fetuses. Egg transfer can be used effectively in studies on implantation and other aspects of swine reproductive physiology.

Footnotes

1 Present address, Animal Science Department, University of Illinois, Urbana.

2 This study was conducted while the senior author held the Senior Research Fellowship of the Pig Industry Development Authority and a Lalor Fellowship.

3 The authors acknowledge the assistance of H. Strange, L. Smith, R. Moor, K. Zerobin, R. Saunders, K. Bilton and A. Guntrip in carrying out the experiments.






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Copyright © 1964 by the American Society of Animal Science.