Pelvic inflammatory disease (PID) is an infection of the reproductive organs of a woman and is caused by complications, usually from that of sexually transmitted diseases such as gonorrhea as well as chlamydia. The development of PID is not only limited to sexually transmitted disease. Statistics show that 1 out of 8 women who have a history of PID will have difficulties conceiving. PID can be prevented if you know how to protect yourself properly. Using the Zithromax plus Flagyl can help in treating the disease as soon as it starts acting up. Of course, knowledge over the symptoms of the disease is important because this will help you determine if you have developed the disease.