From the Preamble to the Constitution:
secure the blessings of liberty to ourselves and our posterity,
Life is clearly defined as a right ("blessing of liberty") in the Declaration of Independence, posterity means those not yet born.
Your liberaltarian interpretation of the Constitution is therefore wrong, try again.
I am just as pro-life as you, but apparently unlike you, I recognize a counterproductive means despite its laudable intent. Giving the Feds blanket authority in matters of life and death is more likely to backfire than to serve your preferences. It is same means that led to "separation of church and state" among too many other usurpations to count, and is far more likely to yield to international standards, which would be disastrous to everything for which you stand.
Go the Federalist route, which is what dispensing with Roe would do anyway.