A 20-year-old nulliparous female college student sees the nurse because she has missed her last two menstrual periods. She reports she has not had sexual intercourse in one month. The nurse requests a pregnancy test, which is negative. Based on this client's history, which assessment is most important for the nurse to obtain?

A. Vaginal discharge, presence of genital warts, abdominal tenderness: While assessing for vaginal discharge and genital warts is important, they are not directly related to the menstrual irregularity described by the client. Abdominal tenderness may be relevant but is not the priority.

B. Urinary frequency, unsteady gait, dental enamel erosion: These symptoms are not specifically associated with missed periods. They may indicate other health issues, but they do not address the primary concern.

C. Breast tenderness, tremors, high blood pressure: Breast tenderness can be related to hormonal changes and menstrual irregularities. Tremors and high blood pressure are less likely to be directly connected to missed periods but should still be assessed.

D. Body weight, hirsutism, thyroid enlargement: Hirsutism (excessive hair growth) and thyroid enlargement (goiter) can be associated with hormonal imbalances, including conditions affecting the menstrual cycle. Assessing body weight is also relevant.