Extension Course

Our Billings Ovulation Method® Extension Course offers teachers the opportunity ​to ​expand their knowledge by drawing on their ​teaching experience to identify what every chart is revealing.

Our next Extension Course in English:
To be determined

Cost: $400 per person, $250 per person if repeating the course.



Have completed teacher training course and certification or have completed teacher training course and a large part of the supervised practicum.

This course meets the continuing education requirement for recertification (required every 3 years).


Teachers will learn:

  • Never to make assumptions
  • To ask the right questions during chart reviews
  • To identify the likely hormone levels and cervical response when reviewing charts
  • To identify a Basic Infertile Pattern (BIP) in charts, especially when ovulation is delayed and when there is no cervical response to rising hormone levels
  • To identify a Peak only when the necessary criteria is present
  • To understand the Continuum of ovarian activity
  • To identify the need for referral for medical investigation when abnormalities in the Billings Ovulation Method® chart are observed

This program is divided into four specific areas.
It begins with a review of the science and methodology to ensure that there is a clear understanding of the basics of the Billings Ovulation Method®. Experienced teachers have all faced charts that present challenges. This program aims to identify the reasons this may be so:

  • Is her chart reflecting what is actually happening with her fertility and infertility?
  • Is her chart an accurate reflection of her life stage?
  • Is her chart reflecting some underlying medical problems?

The basis of this course is the Continuum of Ovarian Activity from Menarche to Menopause the life-work of Emeritus Professor James B Brown


Ferely Medina

Title of talk:

Hormonal Contraception, risks and Side Effects- My Personal Testimony


Ferely Correa born in Venezuela, married and mother of 5, met her husband when they were studying engineering. They now share the same profession as chemical engineers. Previously, Ferely was working as a chemical analyst in Venezuela and Mexico in the oil and gas industry, then moved to Holland, and there, volunteered as a team coordinator of activities related to the expat areas in the Hague, at ACCESS magazine. Currently, she is blessed to be part of the NFP instructors in USA, teaching the Billings Ovulation Method. Teaching has taken her on a rewarding and beautiful journey learning more about her body, how it works and what could potentially damage it.