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1. Pregnancy Confirmation Signs Pregnancy is diagnosed through three categories of signs. Presumptive signs are subjective changes the patient experiences, like amenorrhea, nausea, and breast tenderness. Probable signs are objective findings by a provider, including a positive pregnancy test, Hegar’s sign (softening of the lower uterus), Goodell’s sign (cervical softening), and Chadwick’s sign (bluish-purple cervical discoloration). Positive signs offer 100% accuracy and include ultrasound verification, auscultating fetal heart tones, and provider-palpated fetal movement.