Laura C Torchen1, Richard S Legro2, Andrea Dunaif3. 1. Division of Endocrinology, Ann & Robert H. Lurie Children's Hospital of Chicago, Feinberg School of Medicine, Northwestern University, Chicago, Illinois. 2. Department of Obstetrics and Gynecology, Pennsylvania State University College of Medicine, Milton S. Hershey Medical Center, Hershey, Pennsylvania. 3. Division of Endocrinology, Diabetes, and Bone Diseases, Icahn School of Medicine at Mount Sinai, New York, New York.
Abstract
CONTEXT: Increased testosterone (T) levels are a cardinal feature of polycystic ovary syndrome (PCOS). Female relatives of affected women, including premenarchal daughters, have elevated T levels supporting a genetic susceptibility to this phenotype. Girls with obesity (OB-g) also have increased T levels throughout puberty, which may indicate risk for PCOS. OBJECTIVE: We tested the hypothesis that premenarchal daughters of women affected with PCOS (PCOS-d) have distinctive phenotypic features compared with OB-g. DESIGN, SETTING, AND PARTICIPANTS: Forty-eight PCOS-d, 30 OB-g, and 22 normal weight (NW-g) premenarchal girls were studied. Mothers of OB-g and NW-g had no evidence for PCOS. MAIN OUTCOME MEASURES: Reproductive hormones were measured. RESULTS: Body mass index differed by design, was highest in OB-g, followed by PCOS-d (P > 0.001). PCOS-d and OB-g had similar increases in free T levels compared with NW-g (PCOS-d vs NW-g, P = 0.01; OB-g vs NW-g, P = 0.0001). Sex hormone binding globulin levels were lowest in OB-g and lower in PCOS-d than in NW-g (PCOS-d vs NW-g, P = 0.005; OB-g vs NW-g, P < 0.0001; PCOS-d vs OB-g, P < 0.0001). Anti-Müllerian hormone (AMH) levels in PCOS-d were significantly increased compared with OB-g, who tended to have lower AMH levels than NW-g (PCOS-d vs OB-g, P < 0.0001; PCOS-d vs NW-g, P = 0.10). CONCLUSIONS: Despite similarly elevated free T levels, PCOS-d had increased AMH levels compared with OB-g. This finding suggests that OB-g lack alterations in ovarian folliculogenesis, a key reproductive feature of PCOS. Causal mechanisms may differ in PCOS-d or OB-g, or elevated T in OB-g may not be an early marker for PCOS.
CONTEXT: Increased testosterone (T) levels are a cardinal feature of polycystic ovary syndrome (PCOS). Female relatives of affected women, including premenarchal daughters, have elevated T levels supporting a genetic susceptibility to this phenotype. Girls with obesity (OB-g) also have increased T levels throughout puberty, which may indicate risk for PCOS. OBJECTIVE: We tested the hypothesis that premenarchal daughters of women affected with PCOS (PCOS-d) have distinctive phenotypic features compared with OB-g. DESIGN, SETTING, AND PARTICIPANTS: Forty-eight PCOS-d, 30 OB-g, and 22 normal weight (NW-g) premenarchal girls were studied. Mothers of OB-g and NW-g had no evidence for PCOS. MAIN OUTCOME MEASURES: Reproductive hormones were measured. RESULTS: Body mass index differed by design, was highest in OB-g, followed by PCOS-d (P > 0.001). PCOS-d and OB-g had similar increases in free T levels compared with NW-g (PCOS-d vs NW-g, P = 0.01; OB-g vs NW-g, P = 0.0001). Sex hormone binding globulin levels were lowest in OB-g and lower in PCOS-d than in NW-g (PCOS-d vs NW-g, P = 0.005; OB-g vs NW-g, P < 0.0001; PCOS-d vs OB-g, P < 0.0001). Anti-Müllerian hormone (AMH) levels in PCOS-d were significantly increased compared with OB-g, who tended to have lower AMH levels than NW-g (PCOS-d vs OB-g, P < 0.0001; PCOS-d vs NW-g, P = 0.10). CONCLUSIONS: Despite similarly elevated free T levels, PCOS-d had increased AMH levels compared with OB-g. This finding suggests that OB-g lack alterations in ovarian folliculogenesis, a key reproductive feature of PCOS. Causal mechanisms may differ in PCOS-d or OB-g, or elevated T in OB-g may not be an early marker for PCOS.
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