F.A.Q. How Will Flo Help Me Get Pregnant? Updated on November 29, 2018 Learn how Flo analyzes your health-related information and helps you get pregnant faster. How Flo increases chances to conceive If you want to get pregnant, the dates marked teal in the Flo app are particularly important. This is your fertile window. These are the days with the highest probability of conception. Plan to be intimate during this period. The circled number indicates ovulation. On this day, the chance of conception is at its maximum. The app predicts the fertile window on the basis of cycle data, but you can help define it more precisely — log the symptoms, basal temperature and other parameters regularly. Each parameter affects forecasts — learn more on the symptoms input screen.