Chapter 56: Prevention of Preterm Birth

Chapter 19: Targeted Hormone Assessment of the Menstrual Cycle

Hilgers TW, 2014·The Medical and Surgical Practice of NaProTECHNOLOGY

Chapter 15: Scientific Foundations of the CrMS

Hilgers TW, 2004·The Medical and Surgical Practice of NaProTECHNOLOGY

The CREIGHTON MODEL FertilityCare System (CrMS) rests on a decades-long body of research demonstrating that cervical mucus functions as a physiologically regulated biological valve, opening predictably at the periovulatory estrogen rise and closing in the post-Peak phase. Chapter 15 of Hilgers (2004) synthesizes hormonal, ultrasound, cytologic, and biophysical evidence to establish that a woman's external observation of her Peak Day reliably identifies the fertile window, and documents the system's effectiveness data for both achieving and avoiding pregnancy across a five-study meta-analysis of nearly 1,900 couples.

Chapter 43: Polycystic Ovarian Disease

Hilgers TW, 2004·The Medical and Surgical Practice of NaProTECHNOLOGY

PCOS (polycystic ovary syndrome), increasingly designated PMOS (polycystic metabolic ovary syndrome) to reflect its metabolic complexity, is far more prevalent than its classic presentation suggests, affecting roughly six percent of reproductive-age women and carrying systemic consequences well beyond fertility disruption. This chapter from the foundational NaProTECHNOLOGY textbook maps the hormonal architecture of the condition, its ovulatory defect patterns, its frequent co-occurrence with endometriosis, and the restorative surgical and cycle-tracking approaches developed at the Pope Paul VI Institute.

Chapter 47: Male Infertility: Evaluation and Treatment

Hilgers TW, 2004·The Medical and Surgical Practice of NaProTECHNOLOGY

Male infertility plays a clinically significant role in a large share of couples who struggle to conceive, yet standard laboratory criteria for semen analysis were designed primarily to predict success with assisted reproduction, not natural fertility. NaProTECHNOLOGY approaches male factor as a diagnosable condition with identifiable root causes, applying medical and surgical options aimed at restoring sperm function and combining that work with fertility-awareness charting to maximize the couple's chances of natural conception.