I've pumped exclusively for 8.5 months after trying desperately for 9 weeks to teach my daughter to breastfeed (unsuccessfully). I also had no problems with supply. I went back to work full-time when she was 3 months old. I had read/heard you have to pump 100 minutes/day to keep your supply up, so I was pumping 5x/day for 20 minutes each time. Obviously, most of the milk was expressed in the 1st 10 min or so, but my left breast always had a 2nd letdown at about 18 minutes. I DID notice my supply go down with major changes (i.e., finally giving up trying to breastfeed so baby was not at the breast anymore; going back to work fulltime so baby wasn't even around me as much anymore), but with each change, I never had any problem REestablishing my supply back to normal!!! With focused effort, I could get back to my normal production within a few days. I think the secrets were the 20-min pump times (really emptying myself to stimulate more production), and the hands-free pumping bra thing. I quickly went down to 4x/day, and I can not even BEGIN to tell you how much of a difference that was to me personally and how much that changed my overall lifestyle (Once just when getting up, once on my lunchbreak, once on the drive home from work, and once just before going to bed.....) The longer intervals between pumps were a bit uncomfortable at times, but fitting 4x/day into my routine was infinitely easier, and I seriously think it's the ONLY reason I've lasted this long. I think your supply is probably established by now. It's a TON of work to keep up what you've been doing (no one can believe I've kept mine up this long), so you should really feel great about it. But I think it's safe to increase the intervals between pumping, make sure you try to stick to longer pump sessions to really empty and stimulate your breasts a lot to maintain/reestablish a great supply, and gradually work down to 5x/day then 4x/day. If you're like me (especially if you're going back to work), getting down to 4x/day CAN work, you CAN maintain your supply (I've made about 44-48 oz/day, even more sometimes), and it WILL make you life SOOOOOO much easier (i.e., very routine, no longer such a burden), so you can last for the long haul if you want. Good luck!