Uterine artery embolization ( UAE ) with spherical polyvinyl alcohol ( SPVA ) microspheres ( n = 30 ; 700-900 m and 900-1 ,200 m ; near-stasis or stasis endpoint ) and tris-acryl gelatin ( TAG ) microspheres ( n = 30 ; 500-700 m ; `` pruned-tree '' endpoint ) was performed .