Some woman may ask their doctor to have the strings cut shorter (during this checkup) if they are felt by the womans sexual partner. If this is the case, sometimes the strings are cut so short that the woman cannot actually check for the strings any more. After this doctors visit, regular IUD checkups can be done at the same time as a womans periodic gynecological exam.
That being said, one of the greatest advantages of both the IUD is that, for the most part, once it has been inserted, a woman doesnt have to really do anything.
Sources:
Chi, I.C, Galich, L.F., Tauber, P.F., Wilkens, L.R., Waszak, C.S., Siemens, A.J., & Lippes, J. (Nov. 1986). Severe pain at interval IUD insertion: A case-control analysis of patient risk factors. Contraception, 34(5): 483-495.
Johnson, B. A. (Jan 1, 2005). Insertion and removal of intrauterine devices. American Family Physician, 71(1): 95-104. Robertson, E.M., ed. (Mar. 1988). Proceed with caution during difficult IUD insertion. Contraceptive Technology Update, 9(3): 25-28.

