Expulsion of an intrauterine device (IUD) results in contraception failure. A number of factors may impact the expulsion rate.
Patient selection: woman with insertion of an IUD
Risk factors for expulsion:
(1) time of placement post-partum (see table below)
(2) placement by an intern (postgraduate year 1)
(3) after vaginal delivery (versus after Cesarean section) if placement less than 4 weeks
(4) levonorgestrel intrauterine system if placement less than 4 weeks (versus copper)
Time of Insertion After Vaginal Delivery
Descriptor
Expulsion Rate
<= 10 minutes
immediate
10%
11 minutes to 4 weeks
early
30%
>= 4 weeks
interval
1.9%
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Specialty: Obstetrics & Gynecology
