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β-hCG level in relation to the greatest dimension of ectopic pregnancy (n = 456). Pearson correlation between β-hCG level and greatest dimension was r = 0.144 (P < .001), demonstrating a very weak correlation.
β-hCG, beta-human chorionic gonadotropin; mm, millimeters; mIU/mL, milli-international units per milliliter.
