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Women constitute a high-risk population for bleeding, which is a major prognostic predictor after percutaneous coronary catheterization procedures. We prospectively followed 3,261 consecutive percutaneous coronary procedures performed by radial artery catheterization (RAC) or femoral artery catheterization (FAC). The primary study objective was to determine the relative incidences of in-hospital major and minor puncture-related hemorrhages. Secondary objectives were to (1) identify predictors of major bleeds and (2) estimate how often a second, alternative access site is required for catheterization. In women, no major bleeding occurred after 299 RAC procedures performed, whereas 25 major bleeding episodes occurred after 601 FAC procedures (p = 0.0008). Women who underwent RAC also had a significantly lower incidence of minor hemorrhages than women who underwent FAC (19 of 299, 6.4%, vs …