Implanon users are less likely to be satisfied with their contraception after 6 months than IUD users

Background

The study was conducted to perform a direct comparison of the satisfaction of intrauterine device (IUD) users and Implanon users after 6 months.

Study design

Women were recruited to this study in the contraception clinics of Southern Health and Family Planning Victoria. Each woman completed a questionnaire at the time of starting her contraception with either an IUD or Implanon. Women were sent a follow-up questionnaire after 6 months to assess their satisfaction with their chosen method of contraception.

Results

A total of 439 participants were recruited for this non randomized cohort study; 211 choosing an IUD and 228 choosing to use Implanon. The main reason patients in both groups chose their contraceptive method was recommendation by the doctor. Follow-up was achieved in over 84% in both groups. More than 50% of women in both groups reported at least one side effect. The most commonly reported side effect in both groups was abnormal bleeding and this was also the most common reason for having the contraceptive device removed. The IUD users reported a higher rate of satisfaction with their chosen method of contraception, although there was no difference between groups in the removal rate or whether the women would recommend the contraception to others.

Conclusions

IUD users reported a higher level of satisfaction than did Implanon users at 6 months. Side effects in women using IUDs and Implanon are common. The range of likely side effects should be included in counseling women about long-term reversible contraception.     

Age and Experience-Dependent Representational Reorganization During Spatial Learning

Previously, we found that aged rats showed a significant enhancement of hippocampal CA1 place cell spatial specificity, as well as a reduction of hilar place cell spatial specificity, during asymptote performance of a spatial memory task. Because such an age effect was not observed when animals performed a nonspatial task, the present study tested the hypothesis that the different patterns of spatial selectivity observed in memory and nonmemory tests reflected a redistribution of spatial representations that occurred in response to changing task demands. In the present experiment, after animals became familiar with the test environment and motor demands of performance on a radial maze, CA1 and hilar place cells were recorded as they learned a spatial memory task. CA1 place cells recorded from unimpaired old, but not impaired old or young, animals became more spatially selective as animals learned the task. Hilar spatial selectivity for both age groups was not significantly related to choice accuracy. These data support the hypothesis that at least a subpopulation of aged rats may benefit from reorganization of spatial representations in such a way that the normal age-related spatial learning deficit is attenuated.