If you do not want to use condoms and other contraceptives, but you do not want the child and then vyshemu grief can be helped.
It's enough to know when spermotazoidy have a chance to fertilize an egg, and when not. Calculate these days is very simple. For this, you certainly come in handy this program.
All that is required of you is to find out what day of the menstrual cycle began and how it continues. Ie when you need napkins, tampons, and when they are needed again. Enter the data and get the calendar.
It marked with red color dangerous days, and green safety.
The program has information on its use and brief theory explaining the intricacies of the process of conception.
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