Perpetual Virginity of Mary

Here's a link to a goarch article on the Ever-Virginity of Mary. Here's their comments on the historical question:

Indeed, to suggest (a) that the tradition about her perpetual virginity could have been introduced after apostolic times, (b) that this tradition would have gone little noticed by a Church in the throes of questioning everything about what it believed in the first millennium, (c) that such a novel tradition should be considered inconsequential enough to pass without discussion before it became universally proclaimed, and (d) that such a tradition should have no discernible literary or geographical origin and yet be universally accepted from very early in the Church's history, is to form a very unlikely hypothesis.