Everything I read states to avoid pregnancy for
at least 6 months after stopping ribavrin. This is calculated using the drug's half life. I was told by my doctor that it takes 6 months for ribavirin to be excreted totally from the body. I would think that this could vary slightly depending on the individual's general health, kidney and liver function. The 6 month rule is based on 15 half lives of the drug.
http://www.rxlist.com/cgi/generic2/ribav_wcp.htmIf it were me, I would opt to wait a bit longer. -- due to the "at least" 6 months.
There is a ribavirin pregnancy registry. Found lots of references to it, never found any analysis of the data.
Donna