<qa>  What is the first time women have downloaded the DOT app?The study will recruit women who have already downloaded the DOT app on their Android phones. The study will only recruit women who have previously set their intent in the Dot app as avoid pregnancy and entered their second period start date into the app. Eligible women will be: between 18 and 39 years old, have not been pregnant or used hormonal contraception in the last 3 months, are sexually active in a relationship with a male partner, and desire to avoid pregnancy for at least one year. 