I'm with the other poster on thoughts that 'when a baby cries' we must go. It's old school to just let a baby cry --- raises our cortisol levels and God knows what it does to a baby. Babies need to be cuddled, picked up and loved. All too soon, they will be teenagers, and these precious moments will be gone.
As an aside, I had brunch with my 26-year old and 21-year old. The 21-year old's twin now lives in London, UK --- a good 7 hours flight way from us. :-( So cuddle and co-sleep and enjoy every second of it! Time is precious and our babies are so precious. much love, /Lu