When do they go back to normal?

Seriously...do your hormones ever go back to normal after having a child? I was holding Gabriel and looking at him the other day and got tears in my eyes, because he's getting so big and before you know it he'll be off to college, meeting a girl, getting married, and having his own kids...and never calling me! :(

I'm not normally sappy, but apparently having a kid has changed that about me.