[LH, FSH and ovarian steroids in serum during normal menstrual cycles and cycles with corpus luteum insufficiency in the human female (author's transl)].

LH, FSH, estradiol-17beta, progesterone, 20alpha-dihydroprogesterone, 17alpha-hydroxyprogesterone, delta4-androstenedione and testosterone are determined by radioimmunoassay in serum daily during 11 menstrual cycles. Three of them had to be considered as cycles with corpus luteum insufficiency on the basis of basal body temperature, length of the luteal phase and the pattern of progesterone concentration in serum. One woman conceived during the investigated cycle.