Ok, so I’m thinking two issues here: (if you can do that!?)
1. Whether the Unites States Constitution provides a right to privacy that encompass a woman's right to terminate her pregnancy.
2. Whether States have a "compelling state interest" in overriding that right to privacy for the sake of the fetus's potential life.
the answer to 1. is yes
the answer to 2. is yes/no and viability is the key. In the early stages of pregnancy the woman’s right to privacy is paramount, but later in the pregnancy the viability of fetus takes precedence and the woman’s protected right is forfeit to a "compelling state interest" to protect potential life.

damn, it may be wrong but when i type it out like that it doesn't sound half bad!
what do you think?