At what age did you leave your baby/child to sleep on their own?

[~Kim~]

DD1 was 3. I had a new baby and until then I had sat at the doorway until she fell asleep. One day I couldn't and she just did her own thang...presto.
DS is 3.5 and I still sit on the end of his bed until he is asleep. He actively requests it. Every. single. night....I get my emails read for the day lol.
DD2 is nearly 6months old. I've put her in her bed and she goes to sleep all by herself since she was 9 weeks old. Granted it's next to my bed but she prefers to be on her own.

[LuluHB]

DDs 1 and 2 shared a bed and they would have been 2.5 and 3.5 before we started leaving them when they were still awake