THE LIGHT REGIMEN AND GESTATION LENGTH IN THE MOUSE

in Reproduction

Summary.

The effect of altering the light regimen after copulation upon the duration of pregnancy in mice was investigated. It was found that mice bore young at a constant interval after copulation irrespective of the prevailing light conditions. No evidence was obtained that a light-dependent circadian mechanism determined the delivery time, although the possibility that such a mechanism might be established in the period immediately before mating was not ruled out by the present study. A significant negative correlation of litter size on gestation length was noted.

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     An official journal of

    Society for Reproduction and Fertility

 

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