Found at: http://www.alfi.org.ph/article/articleprint/282/-1/35/

Natural Family Planning - What Is It All About?

Natural Family Planning
What does it mean? How does Billings Ovulation Method work?

Why is it superior to Standard Days Method? Why is ALFI opposed to the promotion of SDM?

  1. Comparison of Natural Family Planning Methods: SDM, Billings and Mercedes Wilson
  2. Notes on the Standard Days Method (SDM)
  3. Presentation on Natural Family Planning and SDM




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