Serum AMH levels in patients were compared with a group of healthy controls. This international reference cohort existed of 554 healthy adult women, aged 18–47 years, who had a regular menstrual cycle and/or were proven fertile.26 (link) AMH levels in controls were originally reported as measured by the Beckman Coulter Gen II Assay. Therefore, a conversion factor was used to compare AMH levels in the patient group to those in the controls25 (link):
AMH(picoAMH assay in ng mL)​​​​​​​​      ​​​​​​​=(1.45*AMHGenII)+0.32.