The blessing on bridal virginity is recorded in the Halakhot Gedolot but dismissed by the Rambam in Teshuvot Harambam, II:364-365, #207. What is the original source for this blessing? Do other halachic works discuss it? Does any sect of Judaism recite this blessing nowadays?
The ערוך השלחן brings this ברכה in 'סימן ס''ג ס''ק י in which he explains the meaning of the ברכה, quotes several מנהגים, and says that people aren't careful with ברכה now, because it is not found in the גמרא. He then explain that the source of the מנהג is from the סעודה that they used to have after the first ביאה.