What do systematic reviews say?

Swim‐up technique vs gradient technique

It is very uncertain whether swim‐up technique changes miscarriage rate per couple compared with gradient technique (very low certainty).

• Semen preparation techniques for intrauterine insemination 2019 · Cochrane Headline outcomes only
  OR 0.85 [0.28, 2.59]
  3 studies · 330 participants
  Very low