Altered ciliary substructure in the endosalpinx in women using an IUCD.

Fallopian tube segments were removed from 20 women undergoing sterilization by laparoscopy or laparotomy. Ten of these patients used an intrauterine contraceptive device (IUCD). The other 10 had used neither IUCD nor oral contraceptives and served as controls. The ciliary ultrastructure was examined by light- and transmission electron microscopy. The IUCD users had a significantly reduced ciliary length and less well oriented cilia, as compared with the control group. Also, the proportion of cilia with a ciliary crown structure was significantly smaller in IUCD users than in the non-users. The mechanism that may cause these alterations and their putative consequences are discussed.