NEW YORK (Reuters Health) - Women who decline prenatal HIV screening are more likely to be HIV positive than women who undergo prenatal HIV screening, according to a study from Canada.Dr. Ameeta E. Singh from University of Alberta, Edmonton, Alberta, Canada and associates compared the characteristics and HIV prevalence of women undergoing prenatal infectious disease screening who accepted prenatal HIV testing with those of women who declined prenatal HIV testing in Alberta from 2002 through 2004.