Infertility and contraception: pregnancy after tubal ligation: 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 · Infertility and contraception: pregnancy after tubal ligation

Sample item

A woman who underwent tubal ligation 3 years ago has missed her period and has a positive urine pregnancy test. Which diagnosis must be urgently excluded?

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

The answer and the reasoning

B. Tubal ectopic pregnancy

Sterilisation failure is uncommon, but when pregnancy occurs a large share are ectopic because a partly patent, damaged tube allows sperm through while the zygote is trapped. Early ultrasound is needed to locate the pregnancy.

Option by option

  • A. Hydatidiform mole

    A molar pregnancy is possible but is not more likely after tubal ligation.

  • B. Tubal ectopic pregnancy (correct)

    Correct. Pregnancy after tubal failure carries a high proportion of ectopic gestations.

  • C. Premature ovarian insufficiency

    A positive pregnancy test makes ovarian insufficiency unlikely.

  • D. Corpus luteum cyst

    A corpus luteum cyst is a benign finding that does not explain the urgency.

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 B, Tubal ectopic pregnancy. Sterilisation failure is uncommon, but when pregnancy occurs a large share are ectopic because a partly patent, damaged tube allows sperm through while the zygote is trapped.

Why is "Hydatidiform mole" not the answer?

A molar pregnancy is possible but is not more likely after tubal ligation.

Why is "Premature ovarian insufficiency" not the answer?

A positive pregnancy test makes ovarian insufficiency unlikely.

Why is "Corpus luteum cyst" not the answer?

A corpus luteum cyst is a benign finding that does not explain the urgency.

What concept does this question test?

It tests Infertility and contraception: pregnancy after tubal ligation in OBG. Early ultrasound is needed to locate the pregnancy.

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 Infertility and contraception: pregnancy after tubal ligation?

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.