Final answer:
The nurse should respond that missing a period is not a reliable indicator of pregnancy, as menstrual cycles can vary in length and other factors can cause a late period. It is important to consider other symptoms of pregnancy and consult a healthcare provider for an evaluation.
Step-by-step explanation:
The nurse should respond with option c) "Missing a period is not a reliable indicator of pregnancy."
Menstrual cycles can vary in length among women and even within the same woman from month to month. Having a late period does not necessarily mean the person is pregnant. Other factors such as stress, hormonal changes, and medical conditions can also affect menstrual cycle regularity.
It is important to consider other symptoms of pregnancy, such as breast tenderness, nausea, fatigue, and frequent urination, to determine if the missed period may be due to pregnancy. However, it is always recommended to consult a healthcare provider for a proper evaluation and diagnosis.