In the center box are links to full text of most bulletins since 2010. If you need to access others, search the Objectrics and Gynecology ("Green Journal") here for full text. Search "all issues" and practice bulletin with the # in your search.
If you are looking for a bulletin prior to 2004 that is listed under Obstetrics category, you will have to search the International Journal of Gynaecology and Obstetrics.
If you would like to browse bulletins from both, take a look at these PubMed records and then find the infolink button to access full text.
The U.S. Preventive Services Task Force aims to evaluate clinical research in order to assess the merits of preventive measures, including screening tests, counseling, immunizations, and preventive medications for primary care.