Fig. 1

Intraoperative surgical procedure: (A) Place a rubber tube behind the lower uterine segment after separating the bladder; (B), Tighten the tube to decrease bleeding; (C) Clamp the parametrial blood vessels with ovum forceps to decrease bleeding; (D) Lower uterine segment-cervix double-row U-shaped through-and-through suture; (E) Schematic diagram of double-row U-shaped through-and-through suture