In the beginning, it appears everyone was on the same page. Below is a Planned Parenthood pamphlet on family planning, as printed in 1952. Quote:
Is it an abortion?
Definitely not. An abortion requires an operation. It kills the life of a baby after it has begun. It is dangerous to your life and health. It may make you sterile so that when you want a child you cannot have it. Birth control merely postpones the beginning of life.