I do not. No individual does. For now, I will settle for what society declares to be moral or immoral...although, obviously, I will have disagreements about it.
Don't for a second suppose you are unique in that. Hitler had a rational for what he considered moral. Idi Amin, Stalin, Pol Pot, Saddam Hussein...all had them, too.
I have mine.
Like everyone else, I have a rational for everything I consider moral or immoral.
Why do you suppose I am lying?
On the question of abortion...my position is that the choice of a woman to terminate a pregnancy occurring in her own body...is moral. She should have that choice...and she should be able to have the abortion in a safe way...with a doctor and a safe environment.