Deborah, here is an article which addresses the idea of "ensoulment," which is the term for what we're talking about.
http://www.lifeissues.net/writers/as...gaquinas1.html
I think it's St. Thomas Aquinas (not Augustine) that is more known for writing about ensoulment of the fetal child. Back in the Middle Ages, there was debate about whether ensoulment might occur at the moment of "quickening," that is, the first time a mother could feel the baby move within her body. Their culture obviously didn't have the detailed kind of knowledge of gestation that we do today: that in fact, the embryo/fetus is moving constantly from practically the first hour it has limbs even before the mother can feel the baby's movements.
In the Bible itself, we have the story of the Visitation, when Mary goes to visit her cousin Elizabeth to tell what the angel Gabriel had to say. The two women, Mary newly pregnant, Elizabeth about six months along, greet each other as does Elizabeth's child (St. John the Baptist) still in the womb, "leaping for joy," recognizing the presence of God's Son, Jesus, in the womb of the Virgin Mary.
Now, obviously this is a special, miraculous, happening, but it demonstrates that both the babies in the womb already had an identity, a soul and body specially created for a purpose, as each of us are.
And this would be where Anthroposophy and orthodox Christian belief collide: Christian teaching holds that each of us are created a unique child of God. There is no existence before the moment of conception. There is the verse, "Before you formed me in the womb, you knew me," but that is more a reflection on God's eternal nature, of him being present in all moments of time simultaneoulsy, rather than a theory of man's heavenly existence before conception in the womb.
Then of course for Catholics, there is the dogma of the Immaculate Conception of Mary, the belief that from the moment of her conception, God removed the stain of original sin from Mary in order that she would be a fitting and holy tabernacle, if you will, of the Living Presence of God incarnate. Like Adam and Eve, Mary was created without sin, which is why Catholics call her the "new Eve," but rather than choosing to sin, as Adam and Eve did, Mary chose to do God's will, "Let it be done to me according to thy Word." So because of this belief in the Immaculate Conception, we believe that Mary already had a soul from the moment of her being formed in her mother's womb.
So there is a lot of Tradition in favor of this idea, although over the centuries there has been debate over it, such as with St. Thomas Aquinas. However, even though a person is a saint, that does not make all their ideas infallible.
Sorry if this was more of an answer than what you were wanting. It's a passion of mine, obviously.
May your children have a wonderful and life-affirming education, wherever they learn,
LeeAnn