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Biology of Reproduction, Vol 20, 462-472, Copyright © 1979 by Society for the Study of Reproduction
1 Southwest Foundation for Research and Education,
San Antonio, Texas 78284 Seven hysterectomized cynomolgus monkeys (Macaca fascicularis) were studied for more than
1 year. Menstrual cycle lengths in hysterectomized monkeys were based on the recurrent pattern of
estrogens and progestins and were identical to menstrual cycle lengths in the same animals prior to
hysterectomy based on the appearance of menses. Peripheral plasma levels of total estrogens and
progestins demonstrated the persistence of a normal follicular phase with a preovulatory estrogen
peak, followed by a normal pattern of luteal progestin secretion. Steroid patterns of hysterectomized animals were comparable to those of contemporary intact controls.
Note:
ACKNOWLEDGMENTS
This study was supported by NICHD Grant No.
RO1-HD-09964. The authors would like to thank
Mr. Cornelio Celaya, Ignacio Gomez and Pat Nash for
their technical assistance and Mr. Armando de la Pena
and Dan Martinez for steroid assays. The critical
comments of Dr. J. W. Goldzieher and the invaluable
editorial assistance of Ms. Jo Fletcher, Mrs. Kathy
Medley and Debra Coronado are greatly appreciated.
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