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CIRCULATING LEVELS OF PROLACTIN DURING THE MENSTRUAL CYCLE
Author(s) -
McNEILLY A. S.,
CHARD T.
Publication year - 1974
Publication title -
clinical endocrinology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.055
H-Index - 147
eISSN - 1365-2265
pISSN - 0300-0664
DOI - 10.1111/j.1365-2265.1974.tb01786.x
Subject(s) - prolactin , menstrual cycle , luteal phase , endocrinology , medicine , follicular phase , chemistry , biology , hormone
SUMMARY In detailed studies on seventeen volunteers, it has been shown that changes in prolactin levels during the menstrual cycle are irregular and inconsistent. Some, but not all, subjects have elevated levels at mid‐cycle, and higher levels in the luteal phase than in the follicular phase. At all stages of the cycle, prolactin levels may show short‐term random fluctuations of as much as 110%. There was no apparent relation between levels of prolactin and those of LH, FSH, oestradiol‐17β or progesterone. It is suggested that if prolactin has any role in the control of the menstrual cycle, then the normal circulating levels are considerably in excess of the threshold requirements for its action.