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Science 27 May 1983:
Vol. 220. no. 4600, pp. 969 - 971
DOI: 10.1126/science.6844923
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Articles

Science, Vol 220, Issue 4600, 969-971
Copyright © 1983 by American Association for the Advancement of Science

articles

Maternal coordination of the fetal biological clock in utero

SM Reppert and WJ Schwartz

Deoxyglucose labeled with carbon-14 was used in studying the utilization of glucose in the suprachiasmatic nuclei of fetal rats. The results showed that an entrainable circadian clock is present in the suprachiasmatic nuclei during fetal development and that the maternal circadian system coordinates the phase of the fetal clock to environmental lighting conditions.


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Finding biological clocks in fetuses.
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