A window covering includes a movable window covering material, lift cords for moving the material, a lift cord take-up shaft for gathering and releasing lengths of the lift cords to move the window covering material, and a motorized lift assembly. The motorized lift assembly includes a motor assembly including a motor, a gear train drivingly connected to and operated by the motor, and a driveshaft drivingly connected to the gear train and to the lift cord take-up shaft. The gear train includes a plurality of planetary gear stages.