• Vienna In Vitro Center, Sofia, Bulgaria
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Fertility Calendar

This tool can help you find out your personal days when fertilization can occur. For that purpose please carry in the first day of your last menstrual bleeding in the first line and your average number of days between the first days of two consequent menstrual cycles (=your cycle duration) and then finally please click the "Berechnen" button.

What was the date of the first day of your last period?:	. .
Adjusted cycle length:

The darker color indicates greater likelihood of becoming pregnant:
fruitful			very fruitful
more likely for girls			more likely for boys