Is the digital signature conserved from a signed .docx converted to .pdf ?

Hi!

I would like to know, before purchase or even try Acrobat XI Pro, the folowing question:

If I sign a Microsoft Word (2010) .docx, and then I convert it to Adobe .pdf with Acrobat XI Pro; is my digital signature yet considered always as a signature, or have I to re-sign it in Acrobat ?

(I think it should have to be conserved, to be really a signature, but am not sure about the technical apsects.)

Thank you in advance for your answers.