I want to get off a Committee

I've been on a committee at work for 2 years now. However, after returning from maternity leave and starting nights part time I'm finding it hard to attend meetings and events for the committee. How do I resign from this committee? I'm also afraid that if I do resign from the committee then my NM will give me some other project to work on. I just don't have the time or energy to commit to anything extra besides my 2 12 hour night shifts. Anyone have any advice on how to resign from the committee but still contribute to my work environment. I don't know, I'm just feeling guilty .
No advice but I wanted to say congrats on the new baby and wish you good luck. When the first Magnet stuff started popping up and they attempted to force feed me a spoonful of grits and tell me it was gravy was when I learned to hide like a rat from those stupid committees that we were expected to deal with on our free time.

You simply say that you need to step back and take some time away from committee work now that the new baby is so demanding. No need to make a big drama about it. It seems like a major event in your life -- but to them, it is just a small thing, a normal part of the work world.I would send a note (or e-mail) to the chairperson of the committee. Just say, "Not now" and give the impression that you will be available for some small tasks to help out after you get better settled with the new baby (if that is the case).

Thanks Ladies !!!! I will definitely send that email stating I will cut back for a while.

I think an email to the chairperson is sufficient. I chair a committee and I really do understand when people want off. Our committees ask for a two year commitment. At that time we realize some people are looking to come off (or the committee is looking for fresh blood).