A Beautiful Quote From “Mad Men”

The following is a quote from one of the best shows on television today, Mad Men.  It comes from Peggy, who is played by Elisabeth Moss, and she is speaking to Pete, who is played by Vincent Kartheiser.  Peggy has just told Pete how she gave up their baby for adoption.  She opines about loss in general when she declares that:

Well, one day you’re there, and then all of a sudden, there’s less of you.  And you wonder where that part went, if it’s living somewhere outside of you, and you keep thinking maybe you’ll get it back.  And then you realize, it’s just gone.

–Peggy Olson (Elisabeth Moss)
Mad Men, “Meditations in an Emergency”
Original Air Date: 10-26-08 on AMC

Is this passage a reference merely to loss in general, or something more specific?  Is she lamenting the loss of her child via adoption, the loss of her innocence/virginity, the loss of a potential relationship with the married Pete, or the loss of part of her soul?

Perhaps it alludes to all of these.  Either way, it makes for some powerful and entertaining television.