If blood is drawn on the third day of menstruation for a sex hormone six test, the results should be referenced to the follicular phase. Although all values are normal during the follicular phase, clinical attention should also be paid to the luteinizing hormone to follicle count ratio. If it is greater than two, the clinic will suspect the presence of polycystic ovary syndrome and further investigations will be required, such as clinical monitoring of ovulation to see if the patient is ovulating. If there is no ovulation or if the ovaries are polycystic bilaterally, the clinical diagnosis of polycystic ovary syndrome can be made. The range of normal values varies from hospital to hospital because of the different reagents used. It is recommended to have a blood test for sex hormone six on the third day of menstruation and compare it with the value of follicular phase.