The Creighton Model FertilityCare System (CrMS) is a method based on a woman’s cervical mucus observations. It is highly effective for avoiding pregnancy, achieving pregnancy, and monitoring a women’s gynecological health.  It can be used with regular or irregular cycles, breastfeeding, post-pill or IUD, or premenopause.  The CrMS charts are used with the science of Natural Procreative (NaPro) Technology to evaluate and monitor reproductive and gynecological health.
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