| http://www.w3.org/ns/prov#value | - A couple may use fertility awareness for birth control if: Their religious beliefs do not allow the use of other methods of birth control.They wish to use a natural method of birth control that does not use medicines, surgery, or other devices.They are willing to pay close attention to the woman's cycle.They are willing to not have sex or to use another birth control method during fertile days.P
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