The typical lab finding in polycystic ovarian syndrome (PCOS) is a ratio of Lutenizing Hormone (LH) to Follicle-Stimulating Hormone (FSH) of 3:1. Because of the pulsatile nature of gonadotropin secretion, there is a wide "normal range" for both LH and FSH. Therefore, a single blood sample from a patient with PCOS will frequently be within normal range. A normal lab result does not exclude PCOS. I would advise discussing your symptoms, clinical examination findings and laboratory investigation results in detail with your family physician or gynaecologist, to understand the features of this syndrome.
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