First Response™

Ovulation Calculator

Increase your chance of conceiving. Determine your most 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

 
Only your physician can accurately determine your due date or the date of your conception based on his/her knowledge of your complete medical condition.