Diurnal variation in uterine estrogen receptors in immature female rats - Inhibition by Arginine Vasotocin

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Abstract
A diurnal variation in uterine estrogen receptors from immature female rats was observed with the peak occurring during the mid-light phase (noon) of the cycle. Although no dose response was noted, all concentrations of arginine vasotocin ranging from 5 × 10−7 to 5 × 10−9 significantly inhibited binding of 3H-estradiol to estrogen receptors in the cytosol fraction of uteri obtained from immature female rats either during the light or dark phase of the photoperiod.