Abstract: A total of 240 women, age 17-40 years, in rural areas in the west of Tabrize city, with self- reported cycles of 26-32 days, desiring to delay pregnancy at least one year were admitted to the study. After teaching the method to the subjects, they followed-up for 12 months to complete the study or dropped out from the study. Only 8 pregnancies occurred during the study and a total of 1956 months were contributed by the 240 study participants. So first-year pregnancy rate was 4.91% and percentage of protection of unplanned pregnancy was 95.09 without considering the correct or incorrect use. Results indicate that this combined method is able to provide a significant protection from unplanned pregnancy and is acceptable to the couples.