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Dr Pixel 2.0Women's imaging diagnosis

PLATFORM FOR EDUCATION AND DECISION SUPPORT IN WOMEN'S IMAGING

Interactive flowchart

Absolute indications for curettage per international guidelines (ACOG, NICE/RCOG, FIGO):

Triage

Question 1 of 4

Infection (endometritis, sepsis)

Yes = criterion present. No = absent.

Ultrasound guidance

Ultrasound is an adjunct: in most cases it should not determine management in isolation. Sonographic findings alone have limited accuracy for predicting need for surgery. Endometrial thickness alone should not be used to mandate uterine evacuation—there is no reliable threshold.

Surgical technique (when indicated)
Prefer vacuum aspiration. Avoid sharp curettage as first-line (less pain, bleeding, and procedure time). [Tunçalp O et al., Cochrane 2010; Huchon C et al., JAMA 2023]
Full references (Vancouver style)
  1. Sporadic Miscarriage: Evidence to Provide Effective Care. Lancet. 2021. Coomarasamy A, Gallos ID, Papadopoulou A, et al.
  2. Treatment Options After a Diagnosis of Early Miscarriage: Expectant, Medical, and Surgical. Deutsches Arzteblatt International. 2021. Musik T, Grimm J, Juhasz-Böss I, Bäz E.
  3. Methods for Managing Miscarriage: A Network Meta-Analysis. The Cochrane Database of Systematic Reviews. 2021. Ghosh J, Papadopoulou A, Devall AJ, et al.
  4. Ultrasonographic Endometrial Thickness After Medical and Surgical Management of Early Pregnancy Failure. Obstetrics and Gynecology. 2008. Reeves MF, Lohr PA, Harwood BJ, Creinin MD.
  5. Endometrial Thickness Following Medical Abortion Is Not Predictive of Subsequent Surgical Intervention. Ultrasound in Obstetrics & Gynecology : The Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology. 2009. Reeves MF, Fox MC, Lohr PA, Creinin MD.
  6. Role of Transvaginal Sonography in the Diagnosis of Retained Products of Conception. Archives of Gynecology and Obstetrics. 2008. Ustunyurt E, Kaymak O, Iskender C, et al.
  7. The Value of Measuring Endometrial Thickness and Volume on Transvaginal Ultrasound Scan for the Diagnosis of Incomplete Miscarriage. Ultrasound in Obstetrics & Gynecology : The Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology. 2007. Sawyer E, Ofuasia E, Ofili-Yebovi D, et al.
  8. Expectant vs Medical Management for Retained Products of Conception After Medical Termination of Pregnancy: A Randomized Controlled Study. American Journal of Obstetrics and Gynecology. 2022. Tzur Y, Berkovitz-Shperling R, Goitein Inbar T, et al.
  9. Surgical Procedures for Evacuating Incomplete Miscarriage. The Cochrane Database of Systematic Reviews. 2010. Tunçalp O, Gülmezoglu AM, Souza JP.
  10. Operative Hysteroscopy vs Vacuum Aspiration for Incomplete Spontaneous Abortion: A Randomized Clinical Trial. The Journal of the American Medical Association. 2023. Huchon C, Drioueche H, Koskas M, et al.
  11. Complications of Unsafe and Self-Managed Abortion. The New England Journal of Medicine. 2020. Harris LH, Grossman D.

Educational tool. Does not replace local protocols or the responsible clinician’s judgement.

Understand the decision

How to decide first-trimester management after miscarriage

Curettage is not routinely required in most first-trimester miscarriages. The choice among expectant, medical, or surgical management depends on urgency criteria, miscarriage type, and patient preference (ACOG, NICE, FIGO).

Absolute indications for curettage

  • Infection (endometritis, sepsis)
  • Heavy persistent bleeding with haemodynamic instability
  • Pre-existing coagulopathy
  • Haemorrhage not responding to conservative measures

In the absence of these criteria, management may be expectant, medical, or surgical — the choice should be shared with the patient.

Management by miscarriage type

TipoConduta
Complete miscarriageThe choice among expectant, medical, and surgical management should be shared with the patient.
Incomplete miscarriageExpectant management, misoprostol, or curettage/uterine aspiration according to availability and patient preference.
Missed miscarriageCurettage/vacuum aspiration with cervical preparation, or mifepristone + misoprostol (if medical management).
Infected miscarriageAntibiotics if infection is suspected or confirmed, and uterine evacuation — prefer vacuum aspiration.
Pregnancy of unknown location (PUL)Serial β-hCG, repeat ultrasound, and assessment for ectopic pregnancy risk (NICE NG126).

The role of ultrasound

Ultrasound is an adjunct: in most cases it should not determine management in isolation. Sonographic findings alone have limited accuracy for predicting the need for surgery. Endometrial thickness alone should not be used to mandate uterine evacuation — there is no reliable threshold.

Surgical technique, when indicated

Prefer vacuum aspiration. Avoid sharp curettage as first-line — less pain, bleeding, and procedure time (Tunçalp O et al., Cochrane 2010; Huchon C et al., JAMA 2023).

Common questions

Frequently asked questions about post-miscarriage management

When is curettage mandatory after a first-trimester miscarriage?+
Only in specific situations: infection (endometritis, sepsis), heavy persistent bleeding with haemodynamic instability, pre-existing coagulopathy, or haemorrhage unresponsive to conservative measures. Outside these criteria, management may be expectant, medical, or surgical, with the choice shared with the patient.
What is the recommended management for incomplete miscarriage?+
Expectant management, misoprostol, or curettage/uterine aspiration according to availability and patient preference — expectant management tends to be highly effective for this type.
What is the recommended management for missed miscarriage?+
Curettage/vacuum aspiration with cervical preparation, or mifepristone + misoprostol for medical management — medical or surgical methods are often preferred over expectant management for this type.
Should endometrial thickness on ultrasound guide the decision to evacuate the uterus?+
No. There is no reliable endometrial thickness cut-off that mandates intervention. Ultrasound plays a complementary role and should not drive management decisions in isolation.
Which surgical technique is preferred when curettage is indicated?+
Vacuum aspiration is preferred as it is safer and less invasive than sharp curettage, with less pain, bleeding, and procedure time.
What should be done when pregnancy of unknown location (PUL) is suspected?+
Follow-up with serial β-hCG, repeat ultrasound, and assessment for ectopic pregnancy risk, per NICE NG126.