Since promising results were obtained with the CuFix interval implant
system in international clinical trials conducted worldwide, a modific
ation of the device adapting it for immediate postplacental insertion
and fixation (IPPIF) seemed a logical approach to solve the expulsion
problem of IUDs inserted at that particular time. Seventy-three insert
ions were performed at three university centers, during 1990 and 1991,
both by skilled and unskilled investigators. The results of this mult
icenter study show the excellent retainability of the modified IUD sup
porting the validity of the anchoring principle. The insertion procedu
re is easy, requiring minimal training, and the insertion technique ap
peared to be safe.