Cervical Mucus Methods

Approaching Menopause: The Ovulation Method
Evelyn L. Billings
This article highlights the symptoms leading up to, and during menopause. A woman's cycle may become irregular at this phase of life, therefore, Dr. Billings stresses the importance of cervical mucus self-regulation and the guidelines of the Ovulation Method to determine the times of fertility.

NaturalFamily Planning: Yesterday, Today, Tomorrow
John J. Billings
Dr. Billings and his wife, Evelyn are the creators of the Billings Ovulation Method. In this article, Dr. John describes how he and his wife discovered and developed the Ovulation Method.

Continuous Mucus: Correlation of Point of Change with Preovulatory Rise in Estradiol-17 Beta
Lorna L. Cvetkovich, Thomas W. Hilgers, and Barbara B. Gentrup
Cervical mucus observation may be difficult for those women with continuous mucus throughout their menstrual cycles. This study aims to prove the value of cervical mucus methods for these women. Rather than examining a woman's onset of cervical mucus, this study evaluates the "Point of Change" in the mucus and its correlation to the woman's hormone levels.

The Mucus Symptom's Length and Subphases during the Fertile Age
Erik Odebald
Along with his colleagues, Dr. Erik Odebald, chairman of the Department of Medical Biophysics at the University of Umea, Sweden, studied the length and quality of the mucus phases throughout a woman's menstrual cycle. Dr. Odebald and his team analyzed over one hundred records of menstrual cycles fulfilling certain criteria. Their results provide further insight into the woman's reproductive cycle and a strong base for understanding several methods of Natural Family Planning.

The Biophysical Properties of the Cervical-Vaginal Secretions: Part I, Part II, Part III
Erik Odebald et al.
This piece describes the work of many researchers over the course of 27 years and the contributions of their work to the effort of Natural Family Planning. Dr. Odebald and his colleagues have been able to classify the different types of mucus during the phases of the menstrual cycle and are better able to recognize the many biological signs of ovulation.

Cervical Factors
Erik Odebald
Dr. Odebald describes experimental investigations done on cervical mucus. There are many different techniques as to how to conduct these studies but Odebald uses this article to discuss the most important results and their significance for fertility problems.

A Prospective Multicentre Study of the Ovulation Method of NFP, III: Characteristics of the Menstrual Cycle and the Fertile Phase
World Health Organization
This article reports of the first international study of the Ovulation Method by the World Health Organization. Researchers studied the characteristics of the menstrual cycles of 725 women. Women were instructed not to use hormones or other forms of contraception, but rather the Ovulation Method of NFP (self-recognition of cervical mucus) during the fertile phase. 

The Two-Day Method


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