[ashark]

> For what it's worth: sleep is a learned habit. So if the infant learns to sleep in your arms it's harder for him/her to learn to sleep by themselves in a cot or bed.

I consider this part of perhaps the most important rule of parenting: don't do (or stop doing ASAP) stuff you don't want to keep doing. Supplementary rule: expect friction any time you stop doing one of these things, and do your best to ignore said friction, or you'll backslide and never effect change, probably causing more total suffering (for all concerned) than if you'd just gone cold-turkey.