What do systematic reviews say?

Cervical dilatation vs no dilatation

Cervical dilatation showed no clear difference in uterine subinvolution compared with no dilatation (low certainty).

• Mechanical dilatation of the cervix during elective caesarean section before the onset of labour for reducing… 2018 · Cochrane Headline outcomes only
  RR 0.34 [0.08, 1.36]
  2 studies · 654 participants
  Low