Ectopic Pregnancy Diagnosis and Management Techniques

Ectopic pregnancy occurs when a fertilised ovum implants outside the endometrial cavity, most commonly in the fallopian tube. Prompt diagnosis relies on serial measurement of β-human chorionic gonadotropin (β-hCG) levels and high-resolution transvaginal ultrasonography. Emerging risk-prediction models for pregnancies of unknown location (PUL) combine biochemical markers and clinical factors to stratify patients and guide follow-up. Management options span expectant observation for naturally resolving cases through medical therapy with methotrexate to laparoscopic surgery for more advanced or unstable presentations. Treatment choice is influenced by haemodynamic stability, gestational size, hCG thresholds and patient fertility aspirations. Innovations in predictive algorithms and early biomarker trajectories seek to refine intervention timing, reduce invasive procedures and preserve reproductive potential. The global burden of ectopic pregnancy underscores the need for accessible diagnostic algorithms and standardised management pathways adaptable to varied healthcare settings.

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Ectopic Pregnancy Diagnosis and Management Techniques publication trend

The graph below shows the total number of articles in ectopic pregnancy diagnosis and management techniques across all publications each year (not limited to Nature Index journals).

Technical terms

β-human chorionic gonadotropin (β-hCG): A hormone produced by trophoblastic tissue, measured serially to monitor the development or resolution of early pregnancies.

Pregnancy of unknown location (PUL): A clinical classification when transvaginal ultrasonography cannot yet locate an intrauterine or ectopic gestation.

M6 model: A risk-prediction algorithm combining biochemical markers and clinical parameters to estimate the likelihood of ectopic pregnancy in cases of PUL.

Single-dose methotrexate: A medical treatment regimen involving a one-time administration of methotrexate to manage ectopic pregnancy.

Expectant management: A non-interventional approach that monitors spontaneous resolution of ectopic pregnancy without immediate medical or surgical therapy.

Transvaginal ultrasonography: An imaging technique using a high-frequency probe inserted into the vagina to visualise pelvic structures and locate early gestational sacs.

References

1. Combination of gefitinib and methotrexate to treat tubal ectopic pregnancy (GEM3): a multicentre, randomised, double-blind, placebo-controlled trial. The Lancet (2023).
2. Updating M6 pregnancy of unknown location risk‐prediction model including evaluation of clinical factors. Ultrasound in Obstetrics and Gynecology (2024).
3. Early (Days 1-4) post-treatment serum hCG level changes predict single-dose methotrexate treatment success in tubal ectopic pregnancy.. Human Reproduction (2023).