When you need to know - 5 days before missed period 99% accuracy based on laboratory testing Earlier result than previous predictor test Quick and simple For compact storage - one click and the handle is removed Early pregnancy test. The amount of hCG hormone increases as pregnancy progresses. Due to its high sensitivity to low levels of hCG hormone Predictor can detect this pregnancy hormone as early as 5 days before missed period. Pregnancy/ovulation/fertility tests