The Creighton Model not only teaches a couple to track their fertility cycles, but also numerous health problems can be identified from the information that women chart. These include infertility, recurring miscarriage, endometriosis, PMS, and hormonal imbalances. It is also a highly adaptable system to many situations - whether women have irregular cycles, are breastfeeding, are premenopausal, or are trying to achieve pregnancy. A woman or couple works individually with a teacher as they learn to chart and use the system based on their situation.