How to choose the right contraception

Persona makes natural fertility awareness more effective. It involves dip-testing your urine on eight days of your monthly cycle (16 days in the first month) and inserting the test stick into a small, hand-held analyser. This measures levels of natural hormones in your urine, in order to assess when you are most at risk of pregnancy. Failure rates are around 6% or greater, depending on how properly it's used, and how rigorous you are in avoiding unsafe sex on unsafe days.