Songs about conquering challenges

I'm making a video of my Wife's and I journey to finally have kids. I'm looking for suggestions of songs that pertain to overcoming challenges, inspirational, etc. A few on my list are:

The Temper Trap - Sweet disposition
Florence + The machine - Shake it out
Flyleaf - All around me
Rob Thomas - Little wonders
Ellie Goulding - Anything could happen (would have been perfect except she starts singing "but I don't need you" at the end which is when the video would be going through the new baby pics. Sucks because we love it.)

These were just a few we thought of. I've been searching for songs similar to these but haven't had much luck. I'd rather not uber religous songs although I understand many inspirational songs have some references.

Any suggestions?