What do systematic reviews say?

UCM vs ECC

UCM showed no clear difference in severe intraventricular haemorrhage (IVH grades 3, 4) compared with ECC (low certainty).

• Effect of timing of umbilical cord clamping and other strategies to influence placental transfusion at preterm birth… 2019 · Cochrane Headline outcomes only
  RR 0.75 [0.39, 1.45]
  6 studies · 618 participants
  Low