Is dilatation and curettage (D&C) a low‑risk procedure for a healthy non‑pregnant adult?

Is Dilatation and Curettage a Low-Risk Procedure?

D&C is not a low-risk procedure for a healthy non-pregnant adult—it carries significant short-term complications and long-term reproductive risks that should prompt consideration of less invasive alternatives whenever possible.

Immediate Procedural Risks

D&C carries well-recognized acute complications that, while relatively uncommon, are clinically significant:

• Uterine perforation risk increases substantially with operator inexperience—endoscopists performing fewer than 500 diagnostic procedures are four times more likely to cause perforation 1
• Infection and sepsis occur in 1.3% of surgical evacuations, though this rate increases to 23.9% with medical management alternatives 2
• Hemorrhage requiring intervention occurs in approximately 9.1% of cases 2
• Cervical tears, bleeding, and Asherman syndrome (intrauterine adhesions from aggressive or repeated curettage) represent additional recognized complications 2, 3

Long-Term Reproductive Consequences

The most concerning risk is the substantial increase in subsequent preterm birth, which directly impacts future pregnancy morbidity and mortality:

• Women with a history of D&C have a 29% increased risk of preterm birth <37 weeks (OR 1.29,95% CI 1.17-1.42) compared to women without such history 3
• The risk escalates for very preterm birth: 69% increased risk for <32 weeks (OR 1.69) and 68% increased risk for <28 weeks (OR 1.68) 3
• Multiple D&Cs compound the risk dramatically, with a 74% increased odds of preterm birth (OR 1.74,95% CI 1.10-2.76), suggesting a dose-response relationship that indicates causality 3
• For spontaneous preterm birth specifically, the odds increase by 44% (OR 1.44,95% CI 1.22-1.69) 3

This meta-analysis of 1,853,017 women demonstrates that the risk remains elevated even when compared to women with medically managed miscarriage or induced abortion (OR 1.19), indicating the mechanical trauma of curettage itself—not the pregnancy loss—drives the increased preterm birth risk 3.

Diagnostic Limitations

Beyond safety concerns, D&C has significant diagnostic inaccuracy:

• Office endometrial biopsy has a 10% false-negative rate, but D&C itself misses pathology in a substantial proportion of cases 1
• In one series, 60% or more of D&Cs showed no significant pathologic findings until age 70, and cancer detection did not significantly increase until after age 50 4
• Hysteroscopic evaluation after "unsuccessful" D&C reveals a remarkably high incidence of missed pathology, mainly submucous myomata, confirming the lack of precision of blind curettage 5

When D&C Is Indicated Despite Risks

D&C remains necessary in specific clinical scenarios where alternatives are inadequate:

• Profuse hemorrhage from incomplete abortion requires urgent surgical evacuation as a life-saving measure 2
• Confirmed infection (maternal tachycardia, purulent discharge, uterine tenderness) mandates immediate broad-spectrum antibiotics plus urgent D&C, as sepsis can develop within 18 hours 2
• Missed abortion at advanced gestational age (≥12 weeks) where medical management has lower efficacy 2
• Fertility-sparing evaluation when considering conservative management of grade 1 endometrial cancer, where D&C provides superior tumor grading compared to office biopsy 1
• Persistent abnormal bleeding after negative office biopsy when endometrial thickness is ≥14 mm with vascularity 1

Safer Alternatives to Consider First

Less invasive options should be prioritized whenever clinically appropriate:

• Medical management with misoprostol (600-800 mcg vaginally) achieves 91.5% success in first-trimester pregnancy loss, though with higher bleeding (28.3%) and infection (23.9%) rates than surgical evacuation 2
• Mifepristone plus misoprostol combination is more effective than misoprostol alone for embryonic demise 2
• Office hysteroscopy with suction curettage offers superior diagnostic accuracy to hospital D&C, is safer, more convenient, and less expensive 6
• Expectant management may be appropriate for completed abortion with declining β-hCG and endometrial thickness <14 mm, though it carries 60.2% maternal morbidity versus 33.0% with active management 2

Critical Clinical Pitfalls

• Do not delay evacuation when infection is suspected—waiting for fever to develop can allow progression to sepsis within 18 hours 2
• Screen for placenta accreta risk before any D&C in women with prior uterine surgery (cesarean, myomectomy, prior D&C)—women with placenta previa and three prior cesareans have up to 40% accreta risk 1
• Avoid unnecessary D&C for diagnostic purposes when office endometrial sampling or hysteroscopy can provide equivalent or superior information 6, 5
• Counsel about future preterm birth risk before elective procedures, particularly when multiple D&Cs are contemplated 3

In summary, D&C should be viewed as a procedure with meaningful short-term complications and substantial long-term reproductive consequences, reserved for situations where less invasive alternatives are inadequate or contraindicated.