Here you go I found this information on webmd.Com. Hope this helps. :)

"what happens if I don't get treated?

For women. If left untreated, the infection can cause pelvic inflammatory disease which can lead to damage of the fallopian tubes (the tubes connecting the ovaries to the uterus) or even cause infertility (the inability to have children), and untreated chlamydia infection could increase the risk of ectopic pregnancy (when the fertilized egg implants and develops outside the uterus.) furthermore, chlamydia can cause premature births (giving birth too early) and the infection can be passed along from the mother to her child during childbirth, causing an eye infection, blindness or pneumonia in the newborn. "