First Response™

Ovulation Calculator

Increase your chance of getting pregnant by determining your most important fertile days.

Increase your chance of getting pregnant by determining your most important fertile days.

My last period began:
My average cycle length is:
 
Calculate My Best Days to Conceive
 

My best days to
conceive are:

From
To
My Likely Due Date is:
 

Looking to narrow your results even further?

Use our FIRST RESPONSE Ovulation Test to determine the
two days you're most likely to conceive. Start testing on:

Your fertile days in

From
To

Your fertile days in

From
To