Quoted from http://www.babycenter.com :

“Your baby is probably happy and outgoing right now, which makes this the perfect time to show her that other people can love her almost as much as you do. Let her spend some time getting accustomed to warm, trusted caregivers and babysitters. The experience will help her feel more secure a couple of months down the road, when separation anxiety makes its entrance and your little extrovert becomes more reluctant to leave your side. “