I have a 10 yr old who until recently had *never* had a dry night.
I did a bit of research and found out some things that are interesting to me & perhaps to you too.
Bedwetting isn't really an issue until the child is 6 yrs or older, simply because it is extremely prevalent prior to 6. So, wait until she's 6 and maybe evaluate the problem then.
Bedwetting, even when parents are non-judgemental, non-critical can affect self esteem. Usually when an older child notices younger siblings or other younger children not using disposable pants at night. It is very true that 99% of children will eventually "grow out of it". But that may not be until their teens. I found my son avoiding situations where he would have to sleep out of our house. Either because he didn't want his extended family/friends to know he wore disposable pants OR because he was afraid they would leak - as they sometimes do. If your child wants to be dry at night, there are ways to help him/her.
Alarms have a confusing reputation. Some parents think it's a "set the alarm & forget it" kind of thing. In the first few days & weeks of using an alarm the *Parents* not the child are the ones who hear it & wake their child & direct them to the bathroom. Eventually the child wakes on his/her own & can go to the bathroom by themselves, but that is not something that will happen the first night. It will take, on average, 10-12 weeks to dryness at nighttime.
Here's a comparison of what percentage of children are dry at night one year after whatever method:
Medications (all of them, used for 3-6 months) have about a 15% success rate. Waiting, Restricting Fluids, Waking your Child, Using alarm Clocks, all have a 15% Many children have wetting problems again when the meds are stopped/decreased. Alarms, when used properly, have a 70-80% success rate.
Our favorite alarm is the Malem Ultimate. It has an audio alarm and it vibrates as well. It is very small. Here is also one of our favorite websites for bedwetting resources:
http://www.bedwettingstore.com/
Your child is still a bit young to start trying most of these things, but perhaps it will be helpful information anyway.