Figure 15. The luteal-follicular transition in women. Data are mean (± SEM) for daily inhibin A, inhibin B, FSH, estradiol, and progesterone levels in the luteal-follicular transition of normal cycling women (n=5). Data are centered to the day of menses in cycle 2. (Welt CK, Martin KA, Taylor AE, et al: Frequency modulation of follicle-stimulating hormone (FSH) during the luteal-follicular transition: evidence for FSH control of inhibin B in normal women. J Clin Endocrinol Metab 82:2645, 1997. Reproduced with permission from The Endocrine Society.)