The Clearblue Advanced Digital Ovulation Test identifies

the fertile window of the menstrual cycle by monitoring two key urinary

fertility hormones, estrone-3-glucuronide (E3G; one of the urinary metabolites

of estradiol) and luteinizing hormone (LH). By measuring these two hormones,

the Clearblue Advanced Digital Ovulation Test is the only ovulation test that

accurately detects the timing of a wider fertile period of typically 4 days, 2

more than other ovulation tests.

Conception is most likely to occur when intercourse takes

place on the day before, or day of ovulation1 and detection of the LH surge is

a precise measure for the timing of ovulation.2 However, conception is possible

when intercourse takes place throughout the fertile window. Importantly, it has

been proposed that regular intercourse during the entire fertile period is more

likely to lead to pregnancy, than intercourse at peak fertility alone.

Establishing the timing of ovulation and a wider fertile win.