Intrauterine contraception with the copper T-200 and the Dalkon shield in nulligravid women.

A randomized, prospective study design compares the small Dalkon shield and the Copper T 200 (T Cu 200) intrauterine contraceptive devices in nulligravid women in the same clinic population during a 12-month period. This prospective study demonstrates statistically significant differences in the accidental pregnancy, expulsion and medical removal rates between the two devices. In nulligravid patients the T Cu 200 had lower event rates than the small shield in the categories of accidental pregnancy and medical removals for bleeding and pain.