Related Experiment Video
Updated: Mar 21, 2026

Evaluation of Hepatic Glucose Production in a Polycystic Ovary Syndrome Mouse Model
Published on: March 5, 2022
Diagnostic criteria for PCOS: Is there a need for a rethink?
1Service de Gynécologie Endocrinienne et Médecine de la Reproduction, Hôpital Jeanne de Flandre, CHRU, F-59037 Lille cedex, France; Faculté de Médecine, Université Lille Nord de France, 59000 Lille, France.
Abstract:
The diagnostic criteria for polycystic ovarian syndrome (PCOS) have been grouped in different classifications that have been conflicting for many years. At present, the classification of Rotterdam is the most used, but with varying frequency depending on the country and medical specialties. This classification is now >10 years old. Although its fundamental principle (two criteria required out of three) is still valid, each of its three items (oligo-anovulation (OA), hyperandrogenism (HA), and polycystic ovarian morphology (PCOM)) needs to be updated. The definition of biological HA is still unresolved. The criteria used to define OA are insufficient. The definition of PCOM proposed in 2003 is now obsolete when using the latest generation of ultrasound machines. The serum anti-Müllerian hormone (AMH) assay seems increasingly to be an excellent substitute for follicular count and is likely to emerge as the official PCOM marker. A new consensus conference is urgently needed.
Related Concept Videos
Irritable Bowel Syndrome II: Clinical Features and Diagnostic Evaluation
Irritable Bowel Syndrome (IBS) is classified into subtypes based on the predominant bowel habits as determined by the Bristol Stool Form Scale (BSFS). The subtypes are:
Oppositional Defiant Disorder
Diagnostic Criteria and...
Oogenesis
Ovarian Cycle
Disorders of the Female Reproductive System
Hormonal Control of the Ovarian Cycle
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle. At puberty, GnRH secretion increases in both frequency and...

