Free babyplan software for windows

The application will calculate a probable date of conception, but also a date of childbirth and estimated sex of a child. 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 (even PDA) with Microsoft Excel installed (or any other software that can work with files *.xls).
Furthermore, the application will calculate a probable date of conception (if in pregnancy) but also a date of childbirth and estimated sex of a child.
System requirements:
- Microsoft Excel (or any other software that can work with xls files)