Clearblue® Advanced Digital Ovulation Test works differently to other ovulation tests as it is designed to detect 2 hormones, estrogen and LH. When it detects a rise in your level of estrogen it displays High Fertility and will continue to display High Fertility in the following days whilst it looks for your LH surge. When your LH surge is detected, the test displays Peak Fertility.HOW DOES IT WORK?The Clearblue Digital Ovulation Test helps you to identify the 2 fertile days in your cycle. This is done by indicating a sudden surge in Luteinizing Hormone (LH) in your body with a simple urine test. LH is the hormone that triggers the release of an egg from your ovary, which is also known as ovulation and generally occurs 24 to 36 hours after the LH increase.
