I get period 6.4.2012 when is my ovulation day?

To calculate your ovulation day, you can use the following formula:

Ovulation day = Day of the last period + (Cycle length - 14 days)

Assuming your cycle length is 28 days, your ovulation day would be:

Ovulation day = April 6, 2012 + (28 days - 14 days) = April 20, 2012

Therefore, your ovulation day would be April 20, 2012.

Ovulation usually occurs about 14 days before the start of your next period. However, it can vary from person to person and from cycle to cycle. To increase your chances of conception, it is recommended to have intercourse in the days leading up to and including ovulation day.