I don't think it's possible to say what the latest version of PeriBirth is because, according to the official website, the product is not available anymore and can be installed by the current customers and that's all.
This is the message posted on the official website: "PeriBirth, PeriGen’s EHR solution for OB, is no longer commercially available."
Use the contact details on the official website to get in touch with the developers.
