Natural Family Planning International, Inc. (NFPI)
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Breastfeeding Infertility Research

Ecological Breastfeeding and Natural Child Spacing (2015)

Breastfeeding Survey

Comparison of Ecological Breastfeeding and LAM (2002)

Spacing Babies with Ecological Breastfeeding (1989)

Review of Breastfeeding Infertility Research up to 1972 (1974)

Relation between Breastfeeding and Amenorrhea (1972)

Postpartum Ovulation (Konald Prem, M.D., 1971)

The Effects of Lactation on Menstruation and Impregnation (Leonard Remfry, M.D., 1895)

The Seven Standards Summary

Planification naturelle des naissances : les sept points de l'allaitement écologique