The Medical and Surgical Practice of NaProTECHNOLOGY, 275-279, 2004
CrMS charting features -- Peak day definition, pre-Peak mucus quality and duration, post-Peak phase length, and premenstrual spotting -- are systematically compared against sonographic and endocrine findings to demonstrate that prospective cycle observations reliably identify specific ovulation disorder categories. This clinical validation shows that the CrMS chart functions as a non-invasive biomarker map capable of directing targeted ultrasound and hormonal investigation, and that treatment guided by the classification improves ovulatory and fertility outcomes.
Hilgers, T. W. (2004). Chapter 22: Disorders of Human Ovulation: Clinical Validation of the Sonographic Classification System. *The Medical and Surgical Practice of NaProTECHNOLOGY*, 275-279.
Hilgers TW. Chapter 22: Disorders of Human Ovulation: Clinical Validation of the Sonographic Classification System. The Medical and Surgical Practice of NaProTECHNOLOGY. 2004:275-279.
Hilgers, T. W. "Chapter 22: Disorders of Human Ovulation: Clinical Validation of the Sonographic Classification System." *The Medical and Surgical Practice of NaProTECHNOLOGY*, 2004, pp. 275-279.