Cluster analysis for NYU study group. This figure demonstrates the cluster analysis of the NYU study group: Cluster 1; Cluster 2; The white boxes represent distributions for the whole NYU study group of patients, while the horizontal lines define the characteristics of patients in the two clusters. Cluster 1 presents women with relatively low gonadotropin dosage requirements of hMG and FSH. As expected, their AMH, testosterone and Androstenedion levels are above median; yet, ploidy is exactly at median. Cluster 2 presents the opposite patient phenotype, with required gonadotropin dosages being high, AMH and androgens low; yet, ploidy again remains at median. The cluster analysis, therefore, demonstrates the expected associations between LFOR, high gonadotropin use and relative hypoandrogenism vs. normal FOR, with low gonadotropin use and normal androgen levels.