answer:Birth control, and especially the birth control pill, was marketed to married women. Maybe they wanted to say the pill helps you plan when and how many children you will have, but still with the assumption couples will have children, so it was controlling births. Not sure. Maybe back in the day using the word birth was more acceptable than pregnancy? Kind of like how no one spoke of breast cancer because it involved saying breast shhh and now people say it without worry. I’m not sure exactly what Sanger meant in her statements. Unfit could be a word used today to describe many people’s opinion about women having babies when they cannot afford them, nor provide a stable home. Are you sure she spoke of eugenics?