Histochemically Demonstrable Catecholamines and Cholinesterases of the Rat Uterus during Estrus Cycle, Pregnancy and after Estrogen Treatment

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Abstract
The changes of the adrenergic and cholinergic nerves of the rat uterus were examined during the estrous cycle, pregnancy and after estrogen treatment. During the first 2 weeks of pregnancy and after estrogen treatment the fluorescence intensity and the thickness of the extra‐vascular adrenergic nerve fibres increased, but decreased in the end of pregnancy. The activity and also the density of AChE‐positive nerves increased after estrogen treatment and during the first 2 weeks of pregnancy and decreased at the end of pregnancy. The AChE‐activity and the intensity of fluorescence in the nerves was somewhat stronger in estrus than diestrus.