What is Persona?

Persona
This is a method of contraception works by monitoring changes in hormones (LH and oestrogen) and identifies the day when the user is at significant risk of becoming pregnant. It consists of test sticks and a hand-held Monitor. The test sticks collect the hormone from the first urine of the day and process them into information that the monitor can read. The monitor shows "Red Day" (days at which the user has risk of becoming pregnant) or "Green day" (days at which the user can have sex). Persona is 94% reliable when correctly used.
        Contraindications are
Cycle length less than 23 days or greater than 35 days
experiencing menopausal symptoms
Breast feeding
Using hormonal treatment (hormonal contraception, fertility treatments, HRT)
Tetracycline
Liver impairment
Renal impairment
Polycystic ovarian syndrome.