What is the function of ciliated cells in lining oviduct?

Cilia help propel a fertilized egg from the ovary's surface, which it usually enters, along the uterine tubes. As cilia are present inside the uterine or fallopian tubes of a human female they move back towards the uterine part so that after 3-4 days the fertilized ovum enters in it. Cilia have the capacity to move the ova that is released by ovary with great precision from uterine part.