I use (the excellent) PDFPenPro, to create PDF Forms... When I open them with Preview, they work great, and if you do a 'Save As' the form is intact. Also, if you open the PDF Form and do a 'Duplicate' the form remains. However, if you Export or Print to PDF, the form fields are removed.But note that when you do so, the result is a static document.
This is different from filling in fields with Adobe Reader and saving the result. If you do that, the fields remain editable.
Either may be preferable, depending on your requirements.