I have had 3 series of ECT. My most recent series was July of 2011. I had 9 initial bilateral treatments followed by maintenance since then. Maintenance started at once a week and then were stretched out until the current every 4 weeks. I have always had bilateral ECT and have had little to no memory problems throughout my treatments. The last time I quit ECT I had nine months with no episodes, the best I have every done. Honestly, if my pdoc suggested that I stay on indefinitely I would do it. My every 4 weeks of ECT is scheduled through April right now.