Antenatal: dating: practice question

A OBG question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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OBG · Antenatal: dating

Sample item

Which ultrasound measurement is most accurate for first-trimester pregnancy dating?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

A. Crown-rump length

This item reviews Antenatal: dating; Crown-rump length is the best answer because it directly fits the maternal or pediatric pattern described.

Option by option

  • A. Crown-rump length (correct)

    Correct. Crown-rump length matches the defining feature.

  • B. Amniotic fluid only

    Amniotic fluid only is not supported by the key finding.

  • C. Femur length only

    Femur length only does not fit the stated presentation.

  • D. Placental thickness

    Placental thickness is plausible but not the single best answer.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

More OBG questions

Questions about this OBG question

What is the answer to this OBG question?

The best answer is A, Crown-rump length. This item reviews Antenatal: dating; Crown-rump length is the best answer because it directly fits the maternal or pediatric pattern described.

Why is "Amniotic fluid only" not the answer?

Amniotic fluid only is not supported by the key finding.

Why is "Femur length only" not the answer?

Femur length only does not fit the stated presentation.

Why is "Placental thickness" not the answer?

Placental thickness is plausible but not the single best answer.

What concept does this question test?

It tests Antenatal: dating in OBG. The correct option holds because: Correct. Crown-rump length matches the defining feature.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Antenatal: dating?

Learn management algorithms as steps: PPH, eclampsia, ectopic pregnancy. Then use the flashcards and the other OBG questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.