Gynaecology & Obstetrics Labour - III bf73c025 Length of Umbilical cord is A 10-20 cm B 20-40 cm C 40-70 cm D 80-100 cm High-Yield Explanation Umbilical cord - Normal length- 40-70 cm long- Cord has three vessels : 1 vein(left) and 2 aeries - Length is influenced by amniotic fluid volume and fetal mobility.