Council of Constantinople II, Fifth Ecumenical Council (553)
Canon 2 If anyone does not confess that there are
two generations of
the Word of God, the one from the Father before the
ages, without
time and incorporeally, the other in the last days.
when the same came
down from heaven, and was incarnate of the holy and
glorious Mother
of God and ever Virgin Mary, and was born of her, let such a one be
anathema.
General Council of Chalcedon (451), DS, 148; Mansi 7.462
Our Lord Jesus Christ . . . indeed born of the Father
before the ages
according to divine nature, but in the last days the
same born of the virgin
Mary, Mother of God according to human nature [“as was
fitting for God,
He sealed her womb." The Greek has
"sphragisanta." In context, it refers
to after birth. Yet that would seem to imply a belief
in physical integrity
"in partu." ]