Panettiere, 25, welcomed daughter Kaya Evdokia with her fiance Wladimir Klitschko on December 9, reported People magazine.
"You're suddenly looking at this little thing like, 'Oh, that was you in my belly this whole time'. (We're) just getting to know her. I'm limping around. I'm still trying to figure out what (pregnancy) has done to my body, how it's changed it. What's temporary and what's permanent.
"I feel like an 80-year-old woman trying to go down the stairs, you know, please tell me this is temporary. But I know some things will never be the same again," she said.