I'm posting a picture of Turtle on Christmas because the message on his shirt applies to today, too.
It's my 40th birthday, and I think a new baby makes a wonderful accessory for the day. When I nurse Turtle, I take off my glasses so I can focus my middle-age eyes on his face. My back has tweaked out more than once from carrying him everywhere. I had horrible hip pain until I realized I was twisting my leg weird with him sleeping beside me.
Having a baby at this age has been different than when Gameboy was born and I was 27. It's totally worth it, though. Let's just hope I can stay in one piece for another year.