How long does it take for untreated chlamydia to cause infertility?

I understand that chlamydia can cause infertility if left untreated, but approximately how long are we talking about

you can have chlamydia without even knowing, no symptoms, so you won't know how long you've had it really.. if you think you or someone you know are at risk please get checked out asap... a health professional can give you the best advice.

It is simple and inexpensive to treat. Also you can get it from vag*nal, an*l, or oral sex. You can even get it in your eye if the guy is a bad shot.

am wanting to know to as I had it for about 5month and I cant seem to get preg now all the doc says is try 4 a year before they can test me to see if I can have anymore