Missing one or two tablets a month is not relatively safe. Depending on where you are at in your cycle, that can render the COC completely ineffective. There are different algorithms for what form you are on and where you are in the back as to what to do, but it is generally a good idea to use a back up method for theā€¦ » 9/17/14 12:45pm 9/17/14 12:45pm