Is freedom just about being able to go out to work unencumbered though? For many, work is just another representation of loss of freedom, enslavement to the rat race, even the most prestigious positions can become mundane after a while. My dsis is childless by choice, for now, she has a fantastic sounding job but I think the novelty has long worn off and she hates the administrative side of it, being on the phone to complaining clients constantly. She derives joy from being able to travel freely, pursue hobbies with dbil, see friends. All those things are easier, though not impossible, without children.
I enjoy having children in my life, for the most part. Mine are a bit older now and we only have two so travel is much easier and 'exotic' more adult destinations easier also. I enjoy watching them do their sports. I like having an excuse to go to parks, museums, seeing kids films, getting ice cream. I think its key, though difficult at times, to retain a sense of self identity. Not always through career, but perhaps outside relationships, study, hobbies, fashion (!), so you don't feel you are only defined by motherhood.