Cover of “Planning Your Family the S-T Way”
Date: 1975.
Credit: “Planning Your Family the S-T Way” by SERENA. The Miss Margaret Robins Archives of Women’s College Hospital, Dr. Marion Powell fonds, POW-18.
This booklet on the Sympto-Thermal (S-T) method of family planning was published by SERENA (Service for the Regulation of Natality). This method is also known as natural family planning.