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. Author manuscript; available in PMC: 2005 Dec 15.
Published in final edited form as: J Clin Endocrinol Metab. 2004 Oct 13;90(1):211–218. doi: 10.1210/jc.2004-0834

Fig. 1.

Fig. 1

Illustrative serum LH concentration profiles in two young and two older men. Subjects underwent blood sampling every 10 min for 24 h on the fifth day of exposure to placebo or anastrozole. LH concentrations were measured via automated, double-monoclonal, LH β-subunit-directed IRMA. Vertical bars associated with each data point denote the within-assay concentration-dependent sd. Arrows mark statistically significant LH pulses detected by model-free Cluster analysis (see Patients and Methods).