Remember the 511 Rule
Many moms wonder when they should go to the hospital when they are in labor. If you have a healthy pregnancy it is best to spend as much of early labor as possible at home in the comfort of your own bed, your own tub, and eating your own food. Being at home will allow you to be more comfortable and move around more.
You should go to the hospital when you contractions are:
5 minutes apart
lasting 1 minute
and this pattern has been for 1 hour
There should also be a change in the moms mood, she should be focused on the contractions and in pain. If the mom is still excited and happy and only uncomfortable it is probably too soon to go in.
If you water breaks, you have bleeding or any other concerns make sure you call your doctor.