Complications of pregnancy: interstitial ectopic pregnancy: 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 · Complications of pregnancy: interstitial ectopic pregnancy

Sample item

A woman at 10 weeks of amenorrhoea collapses with haemoperitoneum. Which ectopic site best explains rupture this late and with torrential bleeding?

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

The answer and the reasoning

A. Interstitial part of the tube

An interstitial pregnancy lies within the myometrium of the uterine cornu, so the muscle allows it to grow before rupturing, typically at 8 to 16 weeks. The bleeding is torrential because the site lies close to uterine and ovarian vessels. Isthmic pregnancies rupture earliest.

Option by option

  • A. Interstitial part of the tube (correct)

    Correct. Myometrial cover delays rupture and the vascular site leads to heavy bleeding.

  • B. Ampulla

    Ampullary pregnancies are the commonest and usually rupture or abort earlier.

  • C. Fimbrial end

    Fimbrial pregnancies often abort into the peritoneal cavity.

  • D. Isthmus

    Isthmic pregnancies are in a narrow part of the tube and rupture earliest.

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, Interstitial part of the tube. An interstitial pregnancy lies within the myometrium of the uterine cornu, so the muscle allows it to grow before rupturing, typically at 8 to 16 weeks.

Why is "Ampulla" not the answer?

Ampullary pregnancies are the commonest and usually rupture or abort earlier.

Why is "Fimbrial end" not the answer?

Fimbrial pregnancies often abort into the peritoneal cavity.

Why is "Isthmus" not the answer?

Isthmic pregnancies are in a narrow part of the tube and rupture earliest.

What concept does this question test?

It tests Complications of pregnancy: interstitial ectopic pregnancy in OBG. The bleeding is torrential because the site lies close to uterine and ovarian vessels. Isthmic pregnancies rupture earliest.

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 Complications of pregnancy: interstitial ectopic pregnancy?

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.