Teen pregnancy, abortion rates at record low, study says
CHICAGO (Reuters) - Birth and abortion rates among U.S. teens fell to record lows in 2008 as increased use of contraceptives sent the overall teen pregnancy rate to its lowest level since at least 1972, a study showed on Wednesday. (Source: Reuters: Health)

Urinary Estrogens and Estrogen Metabolites and Subsequent Risk of Breast Cancer among Premenopausal Women
We examined 15 urinary estrogens/estrogen metabolites and breast cancer risk among premenopausal women in a case–control study nested within the Nurses' Health Study II (NHSII). From 1996 to 1999, urine was collected from 18,521 women during the mid-luteal menstrual phase. Breast cancer cases (N = 247) diagnosed between collection and June 2005 were matched to two controls each (N = 485). Urinary estrogen metabolites were measured by liquid chromatography-tandem mass spectrometry and adjusted for creatinine level. Relative risks (RR) and 95% confidence intervals (CI) were estimated by multivariate conditional logistic regression. Higher urinary estrone and estradiol levels were strongly significantly associated with lower risk (top vs. bottom quartile RR: estrone = 0.52; 95% CI, 0.30–0...