I asked several RC friends this yesterday and to a one they had never heard of Mary's "intact, physical" virginity after the birth of Christ.
It would be interesting to see from where you're getting this and how recently it was determined.
As to the physiological virginity, references were made on this thread to St. Thomas Aquinas; naturally it is not likely something anyone was able to examine. I never researched that question and have no handy answer. It is a post-apostolic doctrine, I believe. It would be equally fine by me if it were taught since yesterday, or not taught at all.
It is however notable that Mary was called the Virgin since pretty much her days on earth, so we can be sure of her social virginity as a part of the Sacred Tradition. That was an observable lifestyle, at least after passing of St. Joseph.
Most Catholics do not spend a lot of time pondering such arcana, unless they have the mind to debate the Protestants. The perpetual social virginity is taught by the Church and that, I trust, most Catholics recognize. The physiological virginity as well as the freedom from birth pain is not a dogma of the Church, so most are not sure what to think about it.
See post 152.
-A8
My, My!
I'm gone for one week......