I was just reading the definition of "infertility" on the mayo clinic site and I noticed that they suggest seeing a doctor for IF testing when you have had prior cancer treatment.

When to see a doctor
In general, don't be too concerned about infertility unless you and your partner have been trying regularly to conceive for at least one year. Talk with your doctor earlier, however, if you're a woman and:

You're age 35 to 40 and have been trying to conceive for six months or longer
You're over age 40, so you should begin testing or treatment right away
You menstruate irregularly or not at all
Your periods are very painful
You have known fertility problems
You've been diagnosed with endometriosis or pelvic inflammatory disease
You've had more than one miscarriage
You've had prior cancer treatment

Has anyone talked to their doctors about TTC, IF, and the connection to prior cancer treatments?

http://www.mayoclinic.com/health/infertility/DS00310/DSECTION=symptoms