Material appearing below is an advertisement for Couple to Couple League, which teaches the full sympto-thermal method of natural family planning to groups of learner couples through a cadre of well-trained teaching couples.
Couple to Couple League
"The Couple to Couple League Approach to Natural Family Planning Instruction,"
The Linacre Quarterly: Vol. 45:
4, Article 14.
Available at: https://epublications.marquette.edu/lnq/vol45/iss4/14