Here is the paraphrased version of question 111 with five options, correct answers, and explanation:
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### **Specialty: Obstetrics & Gynaecology**
**Question:**
A female patient who is unsure of her last menstrual period (LMP), which was approximately 6-8 weeks ago, did a home pregnancy test 2 weeks ago that turned out positive. What is the most accurate method to determine the gestational age?
**Options:**
A) Quantitative β-hCG
B) Physical examination
C) Ultrasound
D) Start calculation from the date of the home pregnancy test
E) Calculate from the estimated date of conception
**Correct Answer:** C) Ultrasound
**Explanation:** **Ultrasound** is the gold standard for accurately determining gestational age, especially in cases where the patient is uncertain about the date of her last menstrual period. While quantitative β-hCG can provide information about the progression of pregnancy, it is not as reliable as ultrasound for dating the pregnancy. Ultrasound can visualize the fetus and measure it to estimate gestational age with precision.
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