If by "unwelcome consquences" you mean a human life, then it isn't that difficult to "excuse" the preservation of said life. For one's freedoms end when it puts in jeapardy the life or property of another. For record I do support a rape exception, but only until the earliest point of possible viability.
Undesired consequences include STDs and bad feelings for getting raped.
Any pregnancy, even a desired one, can go badly. For girls too young to bear a child safely but can't express (due to shame) what happened to them until a pregnancy is obvious, an abortion may be necessary for protecting the life and health (including reproductive health -- potential for subsequent pregnancies) of the child who got pregnant.
1. The "anti-abortion" people are of course outraged.
2. Some people on the Left are vehemently anti-abortion.
3. As a liberal who respects life in the womb I would suggest legislation that prohibits the sale of intoxicating liquors to a pregnant woman to prevent fetal alcohol syndrome.
4. I prefer that abortion be available, safe... and rare.
As a liberal I prefer that children get objective learning about sexuality
including unambiguous teaching that sex involving minors is completely wrong. Sexual freedom includes the right to choose chastity. Children need to recognize that without consent, sex is rape, a terrible and inexcusable crime. Abortion must be available in the event that something goes terribly wrong.
If an eleven-year-old girl is raped? She can't raise the baby, and if she carries the baby to term she may be unable to have another.