Moving baby to crib

Valerie
I don't need any admonition for co sleeping please. It has been amazing and I don't regret it one bit. My son could sleep with us til he is 5 and I wouldn't regret having started it. The goal is to move him to his crib when he turns one though. He's been sleeping in our bed since he was three days old and now won't sleep anywhere without us holding him. When we try to set him down while he is asleep he wakes right up and almost always screams til we pick him back up. How do you transition from co sleeping?