What is the most common cause of uterine inversion?

The most common cause of uterine inversion is excessive cord traction. This occurs when strong pulling on the umbilical cord during the third stage of labor results in the uterus being pulled inside out. Such a maneuver can inadvertently cause the placenta to detach from the uterine wall, leading to inversion. This situation typically arises if the healthcare provider attempts to pull the placenta out before it is fully separated or if significant traction is applied while the uterus is still contracting.

Understanding this mechanism highlights the importance of careful management of the third stage of labor, including appropriate techniques for placental delivery. Knowledge of the risks associated with excessive cord traction is crucial for avoiding this potentially life-threatening complication.