If a last period date is 14th may and period is not regular i.e.2days to 7 days differences, then what is the period where this is the possibilities to woman get pregnant ?

If a last period date is 14th may and period is not regular i.e.2days to 7 days differences, then what is the period where this is the possibilities to woman get pregnant ?

The best time to get pregnant is to have intercourse just before ovulation, if you're pregnant, you will miss your next periods completely.