Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,695 questions · 4,979 findings · 433 reviews

No studies found 998 · 20%GRADE not reported 1,140 · 22.9%Very low 1,024 · 20.6%Low 1,029 · 20.7%Moderate 636 · 12.8%High 152 · 3.1%

Combined oral contraceptive pill vs levonorgestrel intrauterine system

Adverse effects ‐ Any adverse events · heavy menstrual bleeding

It is very uncertain whether combined oral contraceptive pill changes adverse effects ‐ Any adverse events compared with levonorgestrel‐releasing intrauterine system (very low certainty).

1 finding from 1 review