The Progesterone-Sensitive Period of Rat Pregnancy: Some Effects of LHRH and Ovariectomy
- 1 November 1977
- journal article
- research article
- Published by Frontiers Media SA in Experimental Biology and Medicine
- Vol. 156 (2), 345-348
- https://doi.org/10.3181/00379727-156-39933
Abstract
LHRH [luteinizing hormone releasing hormone] (0.5 mg .times. 2) on day 7 of pregnancy is followed by a profound, ephemeral reduction in circulating progesterone, but not by fetal resorption; a similar decrease in progesterone follows the same treatment on day 9, but it is associated with termination of pregnancy in most animals. These effects appear to result from differential sensitivity to progesterone deprivation, since delay of progestational support for varying periods following ovariectomy on day 7 produces fewer indications of resorptions than on day 10. A slight, but significant, reduction in progesterone after treatment on day 13 would appear inadequate to affect continuation of the pregnancy.This publication has 5 references indexed in Scilit:
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- The critical control of progesterone levels and pregnancy by antiprogesteroneAmerican Journal of Obstetrics and Gynecology, 1976
- Progesterone Catabolism in the Rat Ovary: A Regulatory Mechanism for Progestational Potency During Pregnancy1Endocrinology, 1968
- Progesterone and Pregn-4-en-20α-ol-3-one in Ovarian Venous Blood During Various Reproductive States in the Rat1Endocrinology, 1968
- Ovarian Secretion of Progesterone and 20α-Hydroxypregn-4-en-3-one During Pseudopregnancy and Pregnancy in RatsEndocrinology, 1967