Evaluation of secondary amenorrhea * * Normal values are DHEAS: 250 - 300 ng / dL (0.7 - 0.8 mcmol / L) FSH: 5‒20 IU / L Karyotype (female): 46, XX Prolactin: 50 ng / mL (see below) Testosterone: 20 - 80 ng / dL (0.7 - 2.8 nmol / L) Although these values are representative, normal ranges may vary between laboratories.