Which finding is considered a probable sign of pregnancy?

A. Hegar’s sign: Hegar’s sign, a softening of the lower uterine segment, is considered a probable sign of pregnancy. It is an objective finding detected during a pelvic exam and indicates uterine changes associated with early gestation. B. Urinary frequency: Increased urination is a common symptom in early pregnancy, but it is subjective and can result from other causes, making it a presumptive rather than probable sign. C. Tender breasts: Breast tenderness is a frequent early symptom of pregnancy but is subjective and may also occur due to hormonal changes unrelated to pregnancy, classifying it as a presumptive sign. D. Backache: Low back pain is a nonspecific symptom and can occur for multiple reasons; it is considered a presumptive sign rather than a probable sign of pregnancy.