The app allows the user to input reproductive parameters from their dairy herd and then calculate the required number of pregnancies per interval to maintain the herd. Parameters may be derived from DHI reports or DairyComp305™ with the appropriate commands provided. Parameters include herd check interval, herd size, calving interval, pregnancy loss rate and culling rate. Data can be saved in the iPad version for comparison in the future. The user may monitor actual performance by entering actual pregnancies.