never have had one, thank God! i've had 3 hiv tests(one before i was pregnant and one with each of my pregnancies), and syphilis test, they did it when i had a physical, i don't know what else they test for. they were just doing the normal test and asked if i would mind having that one, so i said no. i've been with the same person and only him for almost 8yrs so i wasn't too worried about it, but it doesn't hurt to know for sure.