estrogen ( er ) and progesterone ( pgr ) receptor content was assayed in 290 premenopausal women with primary breast cancer , in order to investigate the influence of endogenous hormones on cytoplasmic receptor concentrations throughout the menstrual cycle , subdivided into four phases of ovarian function ( early and late follicular phase , early and late luteal phase ) .
C0597357
content
C0206587
cytoplasmic receptor