A 14-year-old female client comes into the clinic for an annual exam and expresses concern about not starting her menstrual cycle. Which finding should the nurse recognize as potential cause of delayed menstration? Reference Range: Hemoglobin [10 to 15.5 g/dL (100 to 155 g/L)]

Rationale: A. Family history of breast cancer: While a family history of breast cancer is important for long-term health risk assessment, it does not directly affect the timing of menarche or cause delayed menstruation in adolescents. B. Tanner stage 2 of breast development: Tanner stage 2 indicates early pubertal development, which is typical for girls approaching menarche. Although this shows puberty has begun, it is not itself a cause of delayed menstruation. C. Hemoglobin of 10 g/dL (100 g/L): A hemoglobin level of 10 g/dL represents mild anemia, which may affect overall health but is not usually sufficient alone to delay the onset of menstruation. D. Low body mass index (BMI): A low BMI can result in insufficient body fat necessary for the hormonal regulation of menstruation. Adolescents with low BMI may experience delayed menarche due to decreased estrogen production and energy availability required for the onset of ovulatory cycles.