The application "BabyPlan" is intended for forecasting of the dates with low, average or high probability of conception as well as forecasting of the beginnings of menstruations. The results of the forecast can be used for childbirth planning as well as for contraception. Though there are some similar software, only "BabyPlan" uses cumulative statistical data to give the most reliable results. The application "BabyPlan" is a simply Microsoft Excel workbook, and therefore it can be used at any computer with Microsoft Excel installed (or any other software that can work with files *.xls). Also "BabyPlan" calculates a probable date of conception (if in pregnancy) as well as a date of childbirth and estimated sex of a child. The application includes the detailed help.