Definition: DHEAS is a form of the hormone DHEA that has a sulfate molecule (one sulfur and four oxygen atoms) attached to it. Almost all of the circulating DHEA (meaning in the bloodstream) is in the form of DHEAS. Blood levels of DHEAS tend to be slightly elevated in women with PCOS. Doctors will measure a woman's serum (blood) levels of this steroid to rule out other medical conditions that have similar symptoms to PCOS.

