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FSH, LH, and testosterone levels in 228 patients with Klinefelter syndrome and 224 infertile men with normal karyotypes, with normal values shown in the background (blue fields). Boxes show interquartile range (IQR) with 5th and 95th percentiles. Continuous = median, broken lines = mean, solid circles = values not between 5th and 95th percentiles. Stars indicate significant differences (from [3])
LH: luteinizing hormone; FSH: follicle-stimulating hormone
