Abortion is not a question for just Catholics! It concerns Human Sanctity! Basic Human Principles.
However, to call yourself a Catholic and say you are Pro-Choice…
Talk about OxyMORON!!
The issue of life and its defense and promotion is not a concern of Christians alone. Although faith provides special light and strength,this question arises in every human conscience which seeks the truth and which cares about the future of humanity. Life certainly has a sacred and religious value, but in no way is that value a concern only of believers. The value at stake is one which every human being can grasp by the light of reason; thus it necessarily concerns everyone….
“…When the Church declares that unconditional respect for the right to life of every innocent person—from conception to natural death—is one of the pillars on which every civil society stands, she ‘wants simply to promote a human state. A state which recognizes the defense of the fundamental rights of the human person, especially of the weakest, as its primary duty.’ 
To be actively pro-life is to contribute to the renewal of society through the promotion of the common good. It is impossible to further the common good without acknowledging and defending the right to life, upon which all the other inalienable rights of individuals are founded and from which they develop. A society lacks solid foundations when, on the one hand, it asserts values such as the dignity of the person, justice and peace, but then, on the other hand, radically acts to the contrary by allowing or tolerating a variety of ways in which human life is devalued and violated, especially where it is weak or marginalized. Only respect for life can be the foundation and guarantee of the most precious and essential goods of society, such as democracy and peace.
…There can be no true democracy without a recognition of every person’s dignity and without respect for his or her rights. Nor can there be true peace unless life is defended and promoted.
“…To claim the right to abortion, infanticide and euthanasia, and to recognize that right in law, means to attribute to human freedom a perverse and evil significance: that of an absolute power over others and against others.”
This unqualified and clear truth concerning the inviolable dignity of every human life is a part of the ordinary magisterium of our Church. It is infallibly taught and cannot be discarded by any faithful Catholic. To do so not only puts their own soul at risk, but when they encourage others to adopt such a position they commit an egregious sin called scandal.
~ EVANGELIUM VITAE. The Gospel of Life. Blessed John Paul II
You shall not kill
You have heard that it was said to the men of old, “You shall not kill: and whoever kills shall be liable to judgment.” But I say to you that every one who is angry with his brother shall be liable to judgment.
2258 “Human life is sacred because from its beginning it involves the creative action of God and it remains for ever in a special relationship with the Creator, who is its sole end. God alone is the Lord of life from its beginning until its end: no one can under any circumstance claim for himself the right directly to destroy an innocent human being.”56
I. RESPECT FOR HUMAN LIFE
The witness of sacred history
2259 In the account of Abel’s murder by his brother Cain, Scripture reveals the presence of anger and envy in man, consequences of original sin, from the beginning of human history. Man has become the enemy of his fellow man. God declares the wickedness of this fratricide: “What have you done? The voice of your brother’s blood is crying to me from the ground. And now you are cursed from the ground, which has opened its mouth to receive your brother’s blood from your hand.”
2260 The covenant between God and mankind is interwoven with reminders of God’s gift of human life and man’s murderous violence:
For your lifeblood I will surely require a reckoning. . . . Whoever sheds the blood of man, by man shall his blood be shed; for God made man in his own image.
The Old Testament always considered blood a sacred sign of life. This teaching remains necessary for all time.