Period Calculator

With this tool you can calculate your fertile days. These are the days around your ovulation day. In this period, the probability of becoming pregnant is at its highest.

We would like to point out expressly here that the reverse conclusion is not valid! You can very well become pregnant also before or after these days! The calculated dates cannot therefore be used for contraception purposes. The risk of becoming pregnant before and after these calculated days is approximately 30 percent!

1. Date of your last period:	(in a: DD.MM.YYYY format)
2. Your shortest period from the last 12 months:	(22 to 45 days, normally 28 days)
3. Your longest period from the last 12 months:	(22 to 45, normally 28 days)

Probable date of ovulation:
First fertile day:
Last fertile day:

Between these days and immediately before them, the probability of becoming pregnant is at maximum.