Calcium Regulating Hormones during the Estrous Cycle of the Rat

Publisher Website
Google Scholar
Abstract
Plasma levels of Ca, P, CT, PTH and RPL were measured at 8, 13 and 17 h during the 4-day estrous cycle of the rat. Ca levels fell throughout the day during proestrus (PE) and estrus (E). In contrast Ca rose transiently during diestrus (D1, D2). P levels fluctuated inconsistently at all stages of the cycle with the exception of E where P levels were significantly higher at 13 h. CT levels showed an increase during D1 and D2 and fell to their lowest values during E, at 13 h. Daily fluctuations in each stage were also recorded. Variations of PTH levels during the estrous cycle were minor. PRL levels increased sharply during PE. No direct relationship between PRL secretion and CT secretion could be established. CT but not PTH varies specifically in relation to the estrous cycle. Apparently there is a link between sexual hormones and CT, apparently independent of plasma Ca levels.

This publication has 3 references indexed in Scilit: