Dubious, since:
Well .. there is “research” which specifically shows that the first bodily changes after being impregnated are the milk glands in the breasts.
And .. what they won’t tell women .. WHERE THE CANCERS ARE LOCATED IN THE BREASTS .. the milk glands.
So, people can rely on the “Internation” stats if that’s their choice .. and they can ignore the truth.
I have a family member who almost died from using Ortho-Novum .. but fortunately, a great doctor figured it out and saved her life. However, there are still other methods of contraception if people really do not wish to have children at that time.