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1. Diagnosing and Dating Pregnancy Pregnancy manifestations are categorized into three groups. Presumptive signs are subjective client experiences, such as amenorrhea, fatigue, nausea, and quickening. Probable signs are objective provider findings, including abdominal enlargement, positive hCG tests, Hegar’s sign (softening of the lower uterus), and Chadwick’s sign (bluish cervical mucosa). Positive signs uniquely confirm pregnancy and include auscultated fetal heart sounds, ultrasound visualization, and provider-palpated fetal movement. To calculate the estimated delivery date, use Naegele’s rule: subtract 3 months from th ...