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. Women with pelvic inflammatory disease, or PID, can also experience cramping after sex. PID can be caused by chlamydia, a very common STD, and in some cases, gonorrhea. When PID occurs, the fallopian tubes and uterus become inflamed, which can cause pain after sex and during other times.