For an example of what a good product announcement email looks like, see # 1 in this blog post about marketing emails. (blog.hubspot.com)
Tip: Set up a distribution list for your birth announcement email and / or text so you won't have to worry about missing someone in the excitement. (momtricks.com)
You could also send a new product announcement email to folks who you think might be interested, like current customers. (blog.hubspot.com)