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Clinical significance of first-trimester chorionic bumps: a matched case-control study
1Early Pregnancy and Acute Gynaecology Unit, Kings College Hospital, London, UK.
Summary
A chorionic bump found during early pregnancy ultrasound is linked to a doubled risk of miscarriage, particularly in the second trimester. This finding highlights the clinical significance of this ultrasound diagnosis in early pregnancy care.
Area of Science:
- Obstetrics and Gynecology
- Fetal Medicine
- Diagnostic Ultrasound
Background:
- A chorionic bump is an ultrasound finding in early pregnancy.
- Its clinical significance and association with pregnancy outcomes require further investigation.
Purpose of the Study:
- To determine the clinical significance of a chorionic bump diagnosed by ultrasound.
- To assess the association between chorionic bumps and miscarriage risk.
Main Methods:
- Retrospective case-control study (2003-2010).
- Identified 57 pregnancies with chorionic bumps, matched to controls (1:3).
- Primary outcome: miscarriage vs. ongoing pregnancy.
Main Results:
- Prevalence of chorionic bumps was 1.5 per 1000 pregnancies.
- Women with chorionic bumps had a significantly higher miscarriage rate (38.5% vs. 20.5%).
- Increased risk of second-trimester miscarriages observed in the study group.
Conclusions:
- A chorionic bump in early pregnancy ultrasound is associated with approximately double the risk of miscarriage.
- The increased risk is primarily due to a higher rate of second-trimester miscarriages.
- This finding underscores the importance of monitoring pregnancies with identified chorionic bumps.
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