Complete or incomplete uterine inversion depends on whether fundus has passed through:-
Degrees of Uterine inversion - First degree - There is dimpling of the fundus,which still remains above the level of Internal Os Second degree - The Fundus passes through the cervix but lies inside the vagina Third degree (Complete uterine inversion) - complete uterus outside introitus
Just minimally below normal level
at the level of Vagina
level of Cervix
complete uterus outside introitus
Labour - III