Valley Electronics Daysy Instructions For Use Manual page 19

Intended use: Daysy is intended for measuring and recording basal body
temperature (BBT) as an aid in ovulation prediction to facilitate conception
(not to be used for contraception). daysyView is a software accessory for
Daysy intended for displaying the fertility status processed, stored, and
calculated by Daysy.
Significant performance characteristics: Measurement of basal body
temperature, estimation of fertility status, display of fertility status.
16