There are people here who have had children while on Remicade or Humira...I do not believe, for the literature that I have read, that these medications affect fertility...however, the OLDER meds, methotrexate/Imuran, CANNOT be taken if you want to have a child (if I remember correctly, this is due to defects esp in 1st trimester)
The frequency and length of time you need to take these meds is entirely dependent on your doctor, your disease, and your needs...each case seems to respond just a bit differently...With Humira, it is a self injectable, usually once a month...Remicade, it is infusion usually 1x/8 wks, but could go up, depending on how you react...
But think of it this way, you have a disease that you are going to have for the rest of your life...I hope you achieve and keep remission...and other diseases you have to take meds for life (ie diabetes)...so an injection once a month to keep away pain and surgery, to me, (JMHO) totally worth it.