Re: Lactational Amenorrhea Method
I used LAM (the second set of rules posted) and didn't get pregnant. It wasn't hard to follow--DD nursed frequently and would never take a pacifier or bottle.
The first set sounds more like Ecological Breastfeeding to me. It's a stricter variation.
Here's what Kellymom has to say about both: http://www.kellymom.com/bf/normal/fertility.html
Catherine, mama to Preschooler Girl 9/08, Toddler Boy 3/11, and Twin Girls 2/14!