Although, I like yourself would agree that the Right to Privacy should be deemed a constitutional right, the U. S. Constitution does not guarantee an enumerated "express" right to privacy. However, it does contain the "express" right" to keep and bear arms.
The Roe v Wade decision was not based on an enumerated constitutional guarantee, it is solely based on the courts interpretation of other "express" rights set forth in our constitutions "Bill of Rights".
Such as the privacy of beliefs (1st Amendment), privacy of the home against demands that it be used to house soldiers (3rd Amendment), privacy of the person and possessions as against unreasonable searches (4th Amendment), and the 5th Amendment's privilege against self-incrimination, which provides protection for the privacy of personal information. In addition, the 9th Amendment states that the "enumeration of certain rights" in the Bill of Rights "shall not be construed to deny or disparage other rights retained by the people", as well as; the "Liberty Clause" set forth in the 14th Amendment as it was defined by Justice McReynolds when he wrote in the courts 7-2 decision in the case of Meyer v Nebraska.:
"While this court has not attempted to define with exactness the liberty thus guaranteed, the term has received much consideration and some of the included things have been definitely stated. Without doubt, it denotes not merely freedom from bodily restraint but also the right of the individual to contract, to engage in any of the common occupations of life, to acquire useful knowledge, to marry, establish a home and bring up children, to worship God according to the dictates of his own conscience, and generally to enjoy those privileges long recognized at common law as essential to the orderly pursuit of happiness by free men."
Constitutional interpretation has long remained a highly controversial issue since the very outset of our nation, and for all intents and purposes; will most likely remain as such throughout our nations history.
Until a lawful definition of life is addressed, or there is a constitutional amendment that "expressly" guarantees the right of abortion, it will forever remain an issue of infinite controversy before our the courts.