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The FIGO Ovulatory Disorders Classification System†.

Malcolm G Munro1, Adam H Balen2, SiHyun Cho3

  • 1The University of California, Los Angeles, Los Angeles, CA, USA.

Human Reproduction (Oxford, England)
|August 19, 2022
PubMed
Summary
This summary is machine-generated.

A new classification system for ovulatory disorders, developed by the International Federation of Gynecology and Obstetrics (FIGO), aims to improve diagnosis and treatment. This system, based on the HyPO-P model and GAIN-FIT-PIE mnemonics, addresses limitations of the older WHO classification.

Keywords:
anovulationovulatory disordersovulatory disorders classificationovulatory dysfunction

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Area of Science:

  • Reproductive Endocrinology
  • Gynecology
  • Medical Classification Systems

Background:

  • Ovulatory disorders are common causes of infertility, amenorrhea, and abnormal uterine bleeding, often linked to Polycystic Ovary Syndrome (PCOS).
  • Existing classification systems, like the WHO's, are outdated and do not incorporate recent research or technological advancements.
  • The lack of a consensus classification hinders research, education, and clinical care for ovulatory dysfunction.

Purpose of the Study:

  • To introduce a new, comprehensive classification system for ovulatory disorders developed under the International Federation of Gynecology and Obstetrics (FIGO).
  • To provide a standardized framework that facilitates research, education, and clinical management of ovulatory dysfunction.
  • To replace the outdated WHO classification with a more current and detailed system.

Main Methods:

  • A rigorous Delphi process involving international experts, specialty societies, and patient representatives was employed.
  • The process included two face-to-face meetings and five rounds of expert consultation.
  • The new system was developed based on stakeholder consensus and expert input.

Main Results:

  • A three-level, multi-tiered classification system for ovulatory disorders was established.
  • The primary level uses an anatomic model (Hypothalamus, Pituitary, Ovary) plus PCOS (HyPO-P).
  • Second and third levels incorporate mnemonics like GAIN-FIT-PIE for detailed categorization of causes and specific diagnostic entities.

Conclusions:

  • The new FIGO classification system offers a structured approach to ovulatory disorders, improving clarity for clinicians, researchers, and educators.
  • Widespread adoption of this system is expected to enhance understanding, diagnosis, and treatment of ovulatory dysfunction.
  • The system includes a mechanism for periodic reevaluation and revision to reflect evolving knowledge.