What do systematic reviews say?

Double intrauterine insemination (IUI) vs single IUI

Double intrauterine insemination (IUI) showed no clear difference in multiple pregnancy 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 2.04 [0.91, 4.56]
  5 studies · 2203 participants
  Low