Snoopy:"New guidelines suggest that women should have their first Pap smear by the age of 21 or within 3 years of first sexual intercourse. Women need to continue to have yearly gyn exams to look for any abnormalities or STDs, as well."

http://cancer.about.com/od/thepapsmear/f/beginpapsmear.htm

I'm just guessing here but I'm assuming that in a socialist system of medical care, a person is restricted for the procedure until a certain age?  According to the above, for may "women" the age would be 16. 

This doesn't have much to do with politics unless we're discussing the implications of socialized medicine.  Is that the reason for the 25 year old age limit? 

Family Doctor . org ;)

 Checking a variety of sites, I get different info on when to start and how often.  Basically, proper medical coverage would agree with the medical experts.  Most agree a pap smear should be done within the first few years of becoming sexually active and by age 18-21 even if one is not sexually active.  If a socialized medical system doesn't allow for these parameters, then they are simply playing with the lives of women patients.