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Product Features
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To use the Clearblue® Fertility Monitor – the #1 brand recommended by OB/GYNs – to maximize your chances of getting pregnant, you will need to purchase the Clearblue Fertility Monitor Test Sticks separate from the device. Clearblue Fertility Monitor Test Stick packs include 30 individually wrapped test sticks. The majority of women will need 10 test sticks each cycle. Women with irregular or long cycles may have to use 20 test sticks each cycle.
Taking conception to the next level, the Clearblue Fertility Monitor maximizes a woman’s chances of conceiving a baby by identifying 3x more fertile days compared to traditional ovulation tests. This electronic, hand-held monitor tracks a woman’s personal cycle, detecting two key ovulation hormones: luteinizing hormone (LH) and estrogen. Using the two hormones, the device can pinpoint not only a woman’s 2 peak fertility days, but also 1-5 additional high fertility days prior to ovulation – for a total of up to 6 fertile days.
There are only a few days per cycle when a woman is fertile and can conceive. The following chart outlines the phases of a woman’s menstrual cycle, showing how the two most fertile days coincide with the LH surge (24-36 hours before ovulation) and the release of an egg (ovulation). These are a woman’s 2 best days to conceive a baby.

However, it is generally acknowledged that sperm can survive up to 5 days in the sperm-supportive mucus found in a woman’s body during the fertile days of her cycle meaning there is a fertile window of typically up to 6 days: 5 days before ovulation plus the day of ovulation. Traditional ovulation tests like Clearblue Digital Ovulation Test track the LH hormone and identify a 2 day window of fertility. But the Fertility Monitor also tracks estrogen levels, which rise just before the LH surge, extending the fertile window typically up to 6 days. This extended window can help to reduce the time it takes to conceive2 as it gives more days to try, plus gives advance notice of the 2 peak days.

The Fertility Monitor is easy to use and gives you clear accurate results.



Low fertility = very small chance of conceiving
High fertility = increased chance of conceiving
Peak fertility = highest chance of conceiving
When you’re ready to test for pregnancy, choose a brand and product you can trust. In the Clearblue Pregnancy Test Buying Guide, we outline the different features of pregnancy tests so you can feel maximum confidence throughout the entire conception process.
As the diagram above illustrates, timing is key when trying to conceive a baby. While there are manual charting and calculator methods that may be used to predict ovulation, these methods often fall short. They require tracking a woman’s typical cycle length over several months. However, every woman’s cycle is unique and cycles for any one woman can vary from cycle to cycle – making calendar-based predictions unreliable prediction as well as time-consuming. That’s why Clearblue provides a range of products to help predict ovulation without months of charting. You can learn more about predicting ovulation and which method is right for you in our Ovulation Test Buying Guide.
1 Behre HM et al. Prediction of ovulation by urinary hormone measurements with the home use Clearblue Fertility Monitor: comparison with transvaginal ultrasound scans and serum hormone measurements. Human Reproduction 2000;12:2478-2482.
2 Robinson JE and Ellis JE. Mistiming of intercourse as a primary cause of failure to conceive: results of a survey on use of a home-use fertility monitor. Curr Med Res Opin 2007;23(2):301-6.
Product Details
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Most Helpful Customer Reviews
32 of 32 people found the following review helpful:
4.0 out of 5 stars
Test sticks work fine, even with PCOS!,
By J. Davids "lovesbooks" (Texas) - See all my reviews
Amazon Verified Purchase(What's this?)
This review is from: Clearblue Easy Fertility Monitor Test Sticks, 30 Count (Packaging May Vary) (Health and Beauty)
The test sticks work even if you have PCOS. I know some people in the ttc and pcos forums claim these sticks don't work for PCOS women. However, speaking from someone who has PCOS and cannot alter it with diet and exercise alone, these sticks have worked for the past 10 months to predict ovulation. I even got pregnant after the first 2 months of use, but it sadly ended in a miscarriage. But don't rely on the test sticks alone for ovulation, especially if you have irregular cycles. Temping, charting cm and other methods should be tried, especially during the first few months of the monitor's use. After about 3 cycles, it won't prompt you for sticks too early, especially if you have a longer cycle like most PCOS women. One word of caution: if you're using the monitor while taking fertility drugs, especially those that contain HCG or gonadotropins, don't waste your test sticks during those cycles. It will show up false positives and might throw off your next natural cycle. Basically, this monitor is great for natural cycles in predicting ovulation.
31 of 32 people found the following review helpful:
5.0 out of 5 stars
Trying for our second Clearblue Baby!,
By
This review is from: Clearblue Easy Fertility Monitor Test Sticks, 30 Count (Packaging May Vary) (Health and Beauty)
I bought this item about 3 years ago, and my clearblue baby is going to be 3 in March. We had tried for 3 years before before purchasing this moniter, my cycles are somewhat irregular so it was hard to detect my peak fertility days. We concived on the third month of using this moniter! We are now going to use it agian to concieve another child. What a great product for helping to concieve. Very easy to use and understand, takes out all the
guessing, and helps you concive a baby natrually.
17 of 17 people found the following review helpful:
5.0 out of 5 stars
This whole system is great,
By Christina Kleinschmidt "christy623" (baltimore, Maryland United States) - See all my reviews (REAL NAME)
This review is from: Clearblue Easy Fertility Monitor Test Sticks, 30 Count (Packaging May Vary) (Health and Beauty)
I am 43 and this machine and sticks got me pregnant in one try! We are now going to try one more time! Can't say enough!
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