Depends on which old-time science you’re referring to. Certainly Soviet pseudoscience should be considered “old-time” in our present-day context, but the left wants to continue to present it as contemporary.
What I meant was in those bad old days (which I remember) the media pushed scientists saying there is no baby until the mother gives birth, or a certain trimester, or viability outside the womb or until other certain evidence.
But post 1973 ultrasound can show the baby. And advanced dna research shows the independent life of the baby. And so on. Not known accurately in 1973 when “a mass of tissue” was in a woman and she could get the Dems to issue a pass for killing the baby under that designation.