Dating scan — DRCOG MCQ

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HardAntenatal CareDating scanDRCOG

A 41-year-old woman is uncertain of her last menstrual period and presents for first antenatal assessment at 10 weeks. What is the most appropriate investigation?

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Correct answer: C — Arrange an ultrasound scan for gestational age assessment

Arrange an ultrasound scan for gestational age assessment is the best answer because the vignette is testing Dating scan and the recommended approach is consistent with NICE NG201. The other tests may be useful in different pathways, but they would not be the most direct first investigation for this presentation. Specifically, Full blood count; Pelvic ultrasound; High vaginal swab; Transvaginal ultrasound scan would be suboptimal in this scenario. The first investigation should answer the immediate clinical question and follow the relevant UK pathway.

Reference: NICE NG201