Pregnancy 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.

Try it

OBG · Pregnancy dating

Sample item

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

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

The answer and the reasoning

D. Crown-rump length

The core Pregnancy dating principle supports Crown-rump length; it best explains the clinical feature or management priority stated in this original sample.

Option by option

  • A. Abdominal circumference

    Abdominal circumference may be considered elsewhere but is not the best response here.

  • B. Femur length only

    Femur length only is not supported by the condition or priority described.

  • C. Biparietal diameter

    Biparietal diameter does not align with the expected pregnancy dating finding or action.

  • D. Crown-rump length (correct)

    Correct. Crown-rump length directly addresses the important clue in the stem.

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 D, Crown-rump length. The core Pregnancy dating principle supports Crown-rump length; it best explains the clinical feature or management priority stated in this original sample.

Why is "Abdominal circumference" not the answer?

Abdominal circumference may be considered elsewhere but is not the best response here.

Why is "Femur length only" not the answer?

Femur length only is not supported by the condition or priority described.

Why is "Biparietal diameter" not the answer?

Biparietal diameter does not align with the expected pregnancy dating finding or action.

What concept does this question test?

It tests Pregnancy dating in OBG. The correct option holds because: Correct. Crown-rump length directly addresses the important clue in the stem.

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 Pregnancy 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.