[Fundamental studies, reference values and relationship to menstrual cycle of prolactin RIA BEAD II].

We have tried fundamental studies, reference values and relationship to menstrual cycle on Prolactin RIA BEAD II kit which has a method of IRMA using monoclonal antibody. On clinical studies, we investigated change of serum prolactin level during the menstrual cycle and relationship to other hormones (LH, FSH, estradiol, progesterone). It was the result that prolactin level of follicular phase was lower than that of preovulatory phase and luteal phase. We conclude that change of prolactin level during the menstrual cycle is related with change of estradiol level.