From Fr. John Hardon's Modern Catholic Dictionary and used with permission on Catholic Culture, the Church answers and defines abortion. Excerpts include:
"Direct abortion is any destruction of the product of human conception, whether before or after implantation in the womb. A direct abortion is one that is intended either as an end in itself or as a means to an end. As a willful attack on unborn human life, no matter what the motive, direct abortion is always a grave objective evil.
. . . Abortion has been condemned by the Church since apostolic times. The Teaching of the Twelve Apostles, composed before A.D. 100, told the faithful "You shall not procure abortion. You shall not destroy a newborn child" (II, 2). Direct abortion and infanticide were from the beginning placed on the same level of malice."
If it's not a baby, then she's not pregnant.