Calendar allows you to do the following marks:1. begin / end menstruation2. intimacy (with condom or wothout)There is numeration of days of cycle.
This calendar DOESN'T DO ANY predictions, for example, calculate favorable day for conception.Calendar for marks begin / end menstruation.The numeration of days of cycle helps to indentify the regularity of cycles. The marks of intnmicy help to plan a pragnancy or avoid it.
Note: when you tick "Begin" (begin menstruation) than next 10 days are painted in pink color. After that when you tick "End" (end menstruation), days are between "Begin" and "End" will be painted.