At the 1968 International Conference on Human Rights, family planning became a human rights obligation of every country, government and policymaker.
The conference’s outcome document, known as the Teheran Proclamation, stated unequivocally: “Parents have a basic human right to determine freely and responsibly the number and spacing of their children.”
Read about it here:https://www.unfpa.org/news/fifty-years-ago-it-became-official-family-planning-human-right
Watch the video here: https://youtu.be/NjOBqZd0lMI