So I have a feeling more men have this question than are willing to admit. What makes it so difficult is that we can't ask our wife/significant other/baby's momma without sounding like a self involved jerk. I've got good news and I've got bad news. The good news is yes, it can go back. The bad news is that it requires some work on her part. According to the Mayo Clinic

Kegel exercises. They help so many things, and they're easy to do, or so I hear. The problem is, I can't imagine how I'd bring this up with my wife. Most women can be very self-conscious about this. While there is a way to work on it, it's not our place to bring it up. Luckily, it will probably come up in Lamaze class. That's why the information on the links in this page are for men. While it concerns women, it's only to answer our own fears, not to confirm theirs. Does that make sense?
P.S. Honey, don't read this post...