Miscarriage matters: the epidemiological, physical, psychological, and economic costs of early pregnancy loss.
Level 5 - mechanism / opinion, no new human data
Narrative review and broad epidemiological synthesis combining multiple observational datasets and risk models.
PubMed 33915094 · doi:10.1016/S0140-6736(21)00682-6
What was done
The authors synthesized global epidemiological, clinical, and economic data to characterize the incidence, risk factors, physical and psychological outcomes, and systemic healthcare costs of early pregnancy loss.
What was found
An estimated 23 million miscarriages occur annually worldwide (44 per minute). The pooled risk of miscarriage is 15.3% (95% CI 12.5–18.7%) of recognized pregnancies. Population prevalence for women experiencing one miscarriage is 10.8% (95% CI 10.3–11.4%), two miscarriages is 1.9% (95% CI 1.8–2.1%), and three or more is 0.7% (95% CI 0.5–0.8%). Identified risk factors include female age (<20 or >35 years), male age (>40 years), very high or low BMI, Black ethnicity, previous pregnancy loss, smoking, alcohol, stress, night shifts, air pollution, and pesticide exposure. Documented consequences include physical complications (bleeding, infection), mental health disorders (anxiety, depression, PTSD, suicide), increased future obstetric risks (preterm birth, fetal growth restriction, placental abruption, stillbirth), and long-term cardiovascular disease and venous thromboembolism. In the UK, the short-term national economic cost was estimated at £471 million annually.
Why it matters
This synthesis demonstrates that miscarriage is not an isolated event but a frequent occurrence and a sentinel marker for subsequent maternal obstetric and cardiovascular morbidity, highlighting the need for dedicated high-risk preconception and post-loss psychological care.
Limits
The abstract does not disclose the specific search methodology, primary study inclusion criteria, total participant count, or quality assessment of underlying studies. Economic analyses reflect specific national contexts (UK) that may not generalize globally, and many underlying observational associations are prone to unmeasured residual confounding.
Cited by
- supports One in five pregnancies end in miscarriage, with most occurring in the first trimester.
- supports Miscarriage occurs in approximately 20 million people worldwide each year.