PCR reliability

I've read various articles and posts claiming that PCR tests are not considered reliable after a certain amount of time. I asked my doctor for one nine weeks after a potential oral exposure (with no ejaculation) that came back negative.

I would like to know if that test is considered reliable. Also, are standard ELISA tests normally administered in hospital labs when PCR tests are requested?

I understand what this website's stance is regarding HIV and oral exposures. My question more so pertains to the PCR test itself.

Thanks in advance for your response.

[joggen]

It depends whether it was a DNA or RNA test. Only the RNA test is approved for diagnostic use. Anyway, it doesn't matter what type of test you take if you only had oral sex.

[Teak]

PCR-DNA tests are not accurate at 12 days.
They aren't approved for diagnostic use.
Oral sex is not a risk of HIV transmission.