Is not the Catholic position that Mary remained a virgin for life? That is not scriptural. The Lutheran perspective is that the focus of God's plan, the Bible, everything is about Jesus Christ. The position you posted is from a Solid Declaration on Christ, not His mother. We confess the Apostle's and Nicene Creeds, they and the Bible acknowledge the Virgin birth..
Catholics Mariology ascribes more to the faithful Mary than what is written.
This as you can see refers to the virginity of Mary as it relates to Christ’s birth, not going forward. Matt 1:25.
I should have included raygunfan in my response to you.
raygunfan mentioned that protestants are very quiet on Luther’s words on Mary as ever virgin.
You stated that it isn’t Lutheran doctrine.
I was agreeing with both of your statements.
It is true that Luther did mention several times in his writings that Mary remained a virgin after Christ was born, that Mary bore no other children, and that Joseph never did know Mary carnally.
See
http://www.catholicbridge.com/catholic/martin_luther_on_mary.php
It is also true that protestants, even Lutherans, are very quiet on Luther’s words. Lutherans include it as doctrine in neither the Augsburg Confession nor the Large Confession. It is only mentioned incidentally in the Lutheran Church Missouri Synods declaration on the Person of Christ that Mary nevertheless remained a virgin.
See Section VIII (24) at
file:///C:/Users/Rich/Downloads/Solid%20Declaration%20(2).pdf