EN
Noradrenaline released from ovarian neural terminals and also that attaining the ovary together with blood stimulates steroidogenic process in ovarian cells, as well as, secretion of ovarian oxitocin acting by means of beta-adrenergic membrane receptors. These receptors depending upon the concentration and time of catecholamine action undergo the so-called process of down-regulation and also desensitization of the cell membrane. From this perspective the noradrenergic system (independently from other regulatory factors) is an important element strenghtening ovarian secretory function both during the oestrus cycle and gestation. The in vitro studies point to a direct catecholamines action on ovarian secretory cells. However, the effect of variations in blood flow through the ovary under catecholamines influence on the secretory function of ovarian cells requires further studies.