Relationship between uterine progesterone and fetal development in pigs
The potential relationship between uterine arterial and venous concentrations of progesterone, and porcine fetal size and viability was examined. Sixteen Yorkshire gilts were laparotomized at 27 to 37 days of gestation to count corpora lutea and embryos. Samples of blood were drawn from uterine arte...
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Published in | Biology of reproduction Vol. 25; no. 2; pp. 349 - 352 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
United States
Society for the Study of Reproduction
01.09.1981
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Subjects | |
Online Access | Get full text |
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Summary: | The potential relationship between uterine arterial and venous concentrations of progesterone,
and porcine fetal size and viability was examined. Sixteen Yorkshire gilts were laparotomized at
27 to 37 days of gestation to count corpora lutea and embryos. Samples of blood were drawn from
uterine arteries and veins at each embryonal location of 10 of the gilts but not from the six control
guts. At 60 to 76 days of gestation, a second laparotomy was performed to determine rates of fetal
survival and to draw blood samples from uterine vessels at all fetal locations in each of the 12 gilts
remaining from the first surgery. The percentages of embryos surviving between first and second
surgeries were 51.0% for the experimental gilts and 65.6% for the control gilts (P>0.05). Progesterone concentrations were
higher in arteries than in veins at each fetal location at both surgeries
(P<0.01). The disappearance or utilization of progesterone in the uterine tissues surrounding either
normal or mummified fetuses was greater late in pregnancy compared with the early embryonic
stage (P<0.05). Uterine arterial and venous progesterone concentrations were unrelated to fetal
weight; however, fetal weight was correlated with arterial-venous differences.
These data suggest that some of the progesterone entering the uterine arterial system is metabolized or utilized and does
not reenter the uterine venous system and that this utilization may be
related to fetal weight and stage of development. |
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Bibliography: | L L10 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0006-3363 1529-7268 |
DOI: | 10.1095/biolreprod25.2.349 |