In my mind, I rationalize and justify a woman's choice to get an abortion using the same logic that I use to justify the choice to pull the plug on someone in a coma.

If a loved one of mine were in a coma, I may pull the plug on them if any of the following conditions are met;

1. Recovery from their condition will requite extremely expensive surgery.
2. The patient is unlikely to have a good quality of life.
3. The patient surviving will cause an unbearable inconvenience for someone (an incovenience as bad as an unwanted pregnancy).
   

Since fetuses in the first trimester have about the same level of sentience as someone in a persistent vegetative state, I believe that aborting a fetus in the first trimester is morally the same thing as euthanizing a person in a coma.

When you make the decision about whether or not to pull the plug on someone in a coma, you are dealing with the real possibility that the patient may die even if you pursue really expensive medical treatment. Similarly, when a woman deals with the choice about whether to keep the child, abort it or give it up for adoption, she is dealing with the harsh reality that the child may be still born, even if she gives birth. Pulling the plug on someone is one of the toughest decisions you will ever have to make, just like abortion. Whether or not euthanizing someone in a coma is the right choice varies greatly on a case by case basis, much like abortion. I acknowledge that there exist people who choose euthanasia when that is not the right decision, as is the case with abortion. However, that does not mean that I advocate for either of those things (abortion and euthanasia) to be out lawed.

That was the moral argument for why abortion is at least sometimes the responsible choice; now to the constitutional argument for what the Supreme Court has a vested interest in protecting that right.

Article 12 of the United nations Universal Declaration of Human Rights protects the right to privacy ( https://www.google.com/search?q=the right to privacy is protected by the united nations universal declaration of human rights&rlz=1C5CHFA_enUS959US960&oq=the right to privacy is protected by the united nations universal declaration of human rights&aqs=chrome..69i57.464j0j15&sourceid=chrome&ie=UTF-8 ). One could argue that abortion falls under the broader category or privacy and your protected right to it.