Our present result that serum AMH measurement did not predict the LB rate by OS in patients with POI as accurately as etiological factors, age, and duration of amenorrhea at initiation of follow-up, at least with the assay we used, is not in accordance with the predictability of AMH values in terms of the number of residual follicles by histological examination in patients with idiopathic POI reported by Meduri et al. Here, AMH is linked to amenorrhea.