The Orthodox would say no.
If she was born without sin, would she need a Savior? (Luke 1:47) Further, would she have been able to transmit Jesus into humanity if she were born without it?
That is not to say that after birth she sinned; we say she did not.
Yes. When Gabriel (first name Peter. joke) told Mary she'd be with child, she asked how this could be when "i know no man?" even though she was already engaged to Joe at that time. So that's only explained by temple vow of lifelong virginity. This was practiced by the Essenes according to the Dead Sea Scrolls, so hardly a case of reading Catholicism into Scriptures. On the contrary, Scripture teaches Catholicism.
In first Mary, 2ND Mary, Non Canonized book related to the Bible. She is described as coming from a very poor family. Who could not support her, or possibly a orphan. Who at a young age was raised by the Priest. Orphanage of that time. And at 13 or 14 was given to Joseph as a wife. Common practice at that time. And that He was a older man. So by religious standards of the time. Set by the Priest. She was raised in a sinless environment. A NUNNERY for children.
No. All humans are born with sin because we are all descendants of Adam and Eve.
Romans 5:12-?That is why, just as through one man sin entered into the world and death through sin, and thus death spread to all men because they had all sinned?.
None of the early reformers believed that Mary had sin of any kind. The question should be, "When did Protestants start teaching that she did?" or "Who was the first Protestant that formally taught that Mary was a sinner?"
"But the other conception, namely the infusion of the soul, it is piously and suitably believed, was without any sin, so that while the soul was being infused, she would at the same time be cleansed from original sin and adorned with the gifts of God to receive the holy soul thus infused. And thus, in the very moment in which she began to live, she was without all sin..."
Martin Luther, Weimar edition of Martin Luther's Works, English translation edited by J. Pelikan [Concordia: St.Louis], Volume 4, 694.
This BIBLICAL video about Mary explains more
http://www.youtube.com/watch?v=0aU18v-tl8I