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Biology of Reproduction, Vol 24, 241-244, Copyright © 1981 by Society for the Study of Reproduction
1 Department of Biochemistry and Biophysics,
University of California,
Davis, California 95616 The resorption of the fetal adrenal cortex in 60-90-day-old C3HeB/FeJ female mice was found
to be initiated by successful mating. The complete disappearance of the fetal zone by Day 11 of
pregnancy was assured if embryos implanted in the uterus. The initiation of the degeneration of
the fetal zone was not dependent on the receipt of spermatozoa. Neither was it associated with the
physical stimulation of mating, which induces the pseudopregnant state. It was dependent on
exposure of the female to other factors associated with the mating process, most probably a
component of the fluids in which spermatozoa are transferred.
Note:
ACKNOWLEDGMENTS
This investigation was supported in part by a
grant-in-aid from the American Heart Association and
by grants AM 05741 and GM 19563 from USPHS.
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