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Polyvinyl catheters were placed in the maternal femoral artery (MA) and maternal uterine vein (UV) of 11 near-term ewes and in the umbilical vein of their fetuses. 1-5 days postoperatively 100 ml of air were injected into the umbilical vein of 7 fetuses. 4 fetuses served as controls. Samples of blood from MA were taken 15 min prior to air embolism and every 15 min for 3 h, then at +4, +5 and +6 h after air injection. Plasma levels of estrone (E1) estradiol (E2) and progesterone (P) were determined by radioimmunoassay. In MA and UV of treated ewes there was a significant decrease in P, but not in E1 or E2 after fetal death compared to control ewes. Control levels of P in MA were 9.6 ng/ml; values at 1, +2, +4 and +6 h were 8.8, 3.3, 2.3 and 1.2 ng/ml, respectively.
R M Abrams, and
P S Kalra, and
J F Clapp, and
C J Wilcox, and
R L Carter
August 1969,
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R M Abrams, and
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C J Wilcox, and
R L Carter
June 1988,
Nihon juigaku zasshi. The Japanese journal of veterinary science,
R M Abrams, and
P S Kalra, and
J F Clapp, and
C J Wilcox, and
R L Carter
February 1977,
Obstetrics and gynecology,
R M Abrams, and
P S Kalra, and
J F Clapp, and
C J Wilcox, and
R L Carter
October 1963,
Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.),
R M Abrams, and
P S Kalra, and
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C J Wilcox, and
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January 1991,
Archives of andrology,
R M Abrams, and
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J F Clapp, and
C J Wilcox, and
R L Carter
August 1973,
Biology of reproduction,
R M Abrams, and
P S Kalra, and
J F Clapp, and
C J Wilcox, and
R L Carter
October 1973,
Endocrinology,
R M Abrams, and
P S Kalra, and
J F Clapp, and
C J Wilcox, and
R L Carter
October 1994,
Biology of reproduction,
R M Abrams, and
P S Kalra, and
J F Clapp, and
C J Wilcox, and
R L Carter
January 1964,
Revista de la Sociedad Argentina de Biologia,
R M Abrams, and
P S Kalra, and
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R L Carter
February 1984,
Journal of animal science,
