No, Roe V Wade was the purest form of judicial activism. The issue was whether or not the states should be allowed to regulate abortion, something which had been done for decades and decades, and which is their constitutional right under the tenth amendment. The foundation for the right to abortion, a nonexistent privacy right said to emanate from several amendments, was invented by the court.
And you should be careful about your insistence that being pro-life is a purely religious position. There are many of us who are not religious, but who nevertheless recognize the importance of protecting all humans from violent acts for the overall good of society. And while I cannot prove to you that an embryo is a human person, it most certainly is a growing organism that possesses human DNA, and that will become a conscious person ultimately. It should, therefore, be given the benefit of the doubt, since it possesses the potential of full personhood. That is the logical approach to take, and does not rely on religious belief at all.