Labour: android pelvis: 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 · Labour: android pelvis

Sample item

A fetal head arrests in the mid-pelvis in a transverse position with a converging pelvic sidewall and prominent ischial spines. Which pelvis type is likely?

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

The answer and the reasoning

D. Android

In an android pelvis, the narrow forepelvis and convergent sidewalls prevent rotation of the head, causing deep transverse arrest. Management by rotation with Kielland forceps or caesarean section is considered.

Option by option

  • A. Gynaecoid

    A gynaecoid pelvis allows rotation.

  • B. Anthropoid

    An anthropoid pelvis favours occipitoposterior position.

  • C. Platypelloid

    A platypelloid pelvis obstructs at the inlet.

  • D. Android (correct)

    Correct. Android pelvis causes deep transverse arrest.

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.

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Questions about this OBG question

What is the answer to this OBG question?

The best answer is D, Android. In an android pelvis, the narrow forepelvis and convergent sidewalls prevent rotation of the head, causing deep transverse arrest.

Why is "Gynaecoid" not the answer?

A gynaecoid pelvis allows rotation.

Why is "Anthropoid" not the answer?

An anthropoid pelvis favours occipitoposterior position.

Why is "Platypelloid" not the answer?

A platypelloid pelvis obstructs at the inlet.

What concept does this question test?

It tests Labour: android pelvis in OBG. Management by rotation with Kielland forceps or caesarean section is considered.

How hard is this question?

We tag it as a multi-step question: it asks you to combine more than one idea. 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 Labour: android pelvis?

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.