***TASK***
the task is to simplify the input abstract of a biomedical literature

***INPUT***
the input is the abstract of a biomedical literature

***OUTPUT***
the output is the simplified abstract for the input abstract of a biomedical literature

***DOCUMENTATION***

***EXAMPLES***

Input: Two studies were included in the review. In the one study in HIV infected women, the IUD was compared with depot progestogen or the oral contraceptive, according to the women's choice. As the majority of women chose depot progestogen, we have included this study in the review, within a mixed hormonal contraception sub-group. Overall, the copper IUD was more effective than depot progestogens/hormonal contraception at preventing pregnancy (risk ratio (RR) 0.47; 95% confidence interval (CI) 0.26 to 0.85). HIV disease progression was reduced in the IUD group (RR 0.66; 95% CI 0.46 to 0.96). There was no significant difference in pelvic inflammatory disease rates between the two groups. Discontinuation of the allocated method was less frequent with the IUD in one study, and less frequent with hormonal contraception in the other study (in which women were allowed to switch between various hormonal methods). In the populations studied, the IUD was more effective than hormonal contraception with respect to pregnancy prevention. High quality research is urgently needed to compare the effects, if any, of these two commonly used contraception methods on HIV acquisition/seroconversion and HIV/AIDS disease progression.
Output:

We reviewed studies that compared these two highly effective methods and found the IUD to be better at preventing pregnancy than depot medroxyprogesterone acetate (DMPA). Relevant to HIV positive women are the results of one small trial that found that women using the IUD for contraception where less likely to experience a worsening of their HIV disease than those using hormonal contraception. A large, high quality study is urgently needed to shed light on these findings.