score:3
In Octoechos, ec. 7, 9th hirmos of the Sunday canon
(not sure how it is called in English) we can read:
Слову плоть взаимодавшая
This can be translated as
lended flesh to the Word
Or, 1st troparion of Theotokos Sunday canon, ec. 5
:
От чистых кровей Твоих усырися плоть преестественно
That is:
From pure bloods of Yours, densed the flesh (of Christ) supernaturally
In the last troparion of the Canon to Eucharist:
Бог воплотися от чистых кровей твоих
that is
The God incarnated from pure bloods of yours
And one of my favorite
внутрь во чреве Твоем плоть исткася
inside the womb of Yours, the flesh (of Christ) en-weaved
There are many other troparions like these in Menaion, but i can't find them so quickly.
In short, the significance of Theotokos' contribution in Christ's development was never underestimated. As well as Mary's own holiness, which can be seen from many other texts.