A woman who deliberately destroys a fetus is answerable for murder. And any fine distinction between its being completely formed or unformed is not admissible among us.
I researched when St. Basil lived (born around 330AD) ... I've always known the stand of the Church concerning abortion. And I've wondered how long has this been taught. Well, now I know!
People argue as to when a baby is considered a person. That's why they have this "window of opportunity" to abort a fetus. Which is RIDICULOUS!
The beginning of life is the instant fertilization of the egg by the sperm. Conception is not when a fetus is formed "enough" ... Conceiving is enough. He/she is a person already.