Many people of faith state a person is not a person until they are born. You can not believe in God and believe that to be true.
~God knew and named Christ before He entered Mary's womb. Luke 1:30-33 30 And the angel said to her, “Do not be afraid, Mary, for you have found favor with God. 31 And behold, you will conceive in your womb and bear a son, and you shall call his name Jesus. 32 He will be great and will be called the Son of the Most High. And the Lord God will give to him the throne of his father David, 33 and he will reign over the house of Jacob forever, and of his kingdom there will be no end.”
~Jeremiah 1:5 God knew Jeremiah before he entered the womb and consecrated him before he was born. “Before I formed you in the womb I knew you, and before you were born I consecrated you; I appointed you a prophet to the nations.”
~Galatians 1:15 God set Paul apart before he was born. 15 But when he who had set me apart before I was born, and who called me by His grace, was pleased to reveal His Son to me, in order that I might preach Him among the Gentiles, I did not immediately consult with anyone
~Luke 1:41 John The Baptist lept in his mothers womb as Mary approached. He had a consciousness. And when Elizabeth heard the greeting of Mary, the baby leaped in her womb. And Elizabeth was filled with the Holy Spirit
~ Isaiah 49:1 God called Isaiah when he was still unborn. The Servant of the Lord 49 Listen to me, O coast lands, and give attention, you peoples from afar. The Lord called me from the womb, from the body of my mother he named my name.
I think many people defend abortion because they or someone they love walked down that path and if it is sin/wrong where does that leave them spiritually... I always encourage people to remember David. He was a man who got another mans wife pregnant and then basically had him murdered to cover his offense. He also wrote much of Psalms and was known as a man after God's own heart. We all fall. 1 John 1:9 says If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. So important to remember and encouraging.