Thanks Tertium! I appreciate it!Interestingly (at least to me), I may have actually found a scan of Luther's own penmanship of this section, see this link. I can't make any of it out. He wrote some of the document, but dictated some of it due to kidney stones (as per the link in my previous post).
Edited to add: Here is the German text. The phrase in question is "und von der reinen heiligen Jungfrauen Maria." Luther's typical later view is that at Christ's conception the Holy Spirit sanctified Mary so that the child would be born with non-sinful flesh and blood. It was not adherence to the Roman error of the immaculate conception. The phrase though that's left out is "ever virgin." (und von der reinen heiligen Jungfrauen Maria geboren sei . Danach gelitten , gestorben, begraben , zur Hölle gefahren).