A chemical formula that indicates the simplest numerical ratio of the elements within a molecule, without demonstrating the molecule's chemical bonds or structure. For example, the empirical formula for water is H2O. Synonym: molecular formula.
Pelvic inflammatory disease (PID) is an infection caused by bacteria. When bacteria from the vagina or cervix travel to your womb, fallopian tubes, or ovaries they can cause an infection. Most of the time, PID is caused by bacteria from chlamydia and gonorrhea. These are sexually transmitted infections (STIs). Having unprotected sex with someone who has an STI can cause PID.
Pelvic inflammatory disease may require surgery. This is rare and only necessary if an abscess in your pelvis ruptures or your doctor suspects that an abscess will rupture. It can also be necessary if the infection does not respond to treatment. The bacteria that cause PID can spread through sexual contact. If you are sexually active, your partner should also get treated for PID. Men may be silent carriers of bacteria that cause pelvic inflammatory disease.