English to Arabic Medical Medical: Health Care translation of health education material

Some women may need to get tested for cervical cancer more often, like if you have had changes to your cervix before, if you have a weak immune system, or if your mother took a medicine called DES when she was pregnant with you.

Why should I get tested?
Getting regular tests will help find changes early enough so that they can be treated and cervical cancer can be prevented.

What does this abbreviation stand for? And what would be the best translation for it into Arabic?

Please provide references/explanation.

Many thanks!