Biol Reprod Keystone Symposia Conference on Frontiers in Reproductive Biology & Regulation of Fertility.
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Biology of Reproduction, Vol 14, 190-193, Copyright © 1976 by Society for the Study of Reproduction

The Stability of Uterine Activity in Nonpregnant Rabbits During Short-Term Cross-Transfusion with Blood from Pregnant Rabbits

J. HERCZEG 1, and I. TOROK 1

1 Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri


Porter reported that a 60 min long cross-transfusion with pregnant donors reduces in ovariectomized nonpregnant rabbits both the frequency and magnitude of intrauterine pressure (IUP). On the basis of this observation, he postulated "the existence of a second myometrial inhibitory substance which acts in conjunction with progesterone in maintaining pregnancy."

This experiment of Porter has been repeated. Both the frequency and magnitude of IUP remained stable during cross-transfusion, regardless of whether the donors were pregnant or nonpregnant, except when cyanosis signaled respiratory problems. These results do not substantiate Porter's observations nor his postulate.

Note:
ACKNOWLEDGMENT The authors are grateful to Gabriele Salau for her dedicated assistance which made this work possible and to Wynne Stifel for her help in the manuscript.

Submitted on July 15, 1975
Accepted on October 8, 1975






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Copyright © 1976 by the Society for the Study of Reproduction.