1) God is active in the womb.  Humans have value after conception.  See
    Psalm 139:13-16 and cp.  Ecclesiastes 11:5; Isaiah 44:2, 24; 49:5;
    Jeremiah 1:5 and Job 31:15.

2) The human sin nature starts at conception.  See Psalm 51:5.

3) Jeremiah lamented that a man did not kill him in the womb before
    birth.  See Jeremiah 20:17 cp. with Job 3:11-16.

4) God's law for Israel required "life for life" for a caused miscarriage if the
    child was born dead.  See Exodus 21:22-23.