Information
The Seven Standards of Ecological Breastfeeding Summary at NFP International
Breastfeeding and Fertility (scroll down to the section entitled “How can I maximize my natural period of infertility?”)
Books
Breastfeeding and Natural Child Spacing by Sheila Kippley
The Seven Standards of Ecological Breastfeeding: The Frequency Factor by Sheila Kippley
Getting Started with Breastfeeding: For Catholic Mothers
Natural Family Planning: The Complete Approach
For the complete list go to https://catholicbreastfeeding.blogspot.com/2020/05/information-and-support-for-practicing.html