What do systematic reviews say?

Double intrauterine insemination (IUI) vs single IUI

Double intrauterine insemination (IUI) showed no clear difference in miscarriage ratea compared with single IUI (low certainty).

• Double versus single intrauterine insemination (IUI) in stimulated cycles for subfertile couples 2021 · Cochrane Headline outcomes only
  OR 1.78 [0.98, 3.24]
  6 studies · 2363 participants
  Low