Yep I've used it for 4 years now. There is an excellent book called Natural Fertility by Francesa Naish which goes through natural fertility management (NFM) in detail for both contraception and conception purposes. I would suggest picking up a copy and doing some research to see if it is for you. I think it's great and as a result of using NFM fell pregnant first month with our DD as you really do become very in tune with your body and your cycle.

If you google Natural Fertility Management Francesca's site will come up. It's got heaps of great info.

Good luck with it.