Women using the Marquette Method of NFP track their reproductive hormone levels each day by performing a simple urine test and using a Clearblue fertility monitor to read the results. Within minutes of conducting the test, the monitor digitally displays one of three readings—low, high, or peak—which indicates the woman’s hormone levels that day. This information—together with the Marquette Method instructions, algorithm, and method of charting—provides couples with a highly accurate home-based method of fertility measurement.
Research has shown that, when practiced correctly and under the guidance of a Marquette Method Instructor, the Marquette Method of NFP can be up to 99% effective at avoiding unintended pregnancies. Because the method measures the reproductive hormones directly (estrogen and luteinizing hormone), rather than the external symptoms of changing hormones, the fertile window can be defined more accurately and precisely. This can help to minimize unnecessary abstinence.
Other forms of NFP require users to interpret sometimes-ambiguous fertility indicators like cervical mucus quality. Breastfeeding women in particular often have fertile mucus that is difficult to interpret. The Marquette Method of NFP, by using the Clearblue monitor, provides a user-friendly, objective picture of fertility and direct insight into the underlying hormonal activity that powers the reproductive cycle. The objectivity of the method takes much of the worry and guesswork out of NFP.