Product Type: Clearblue health products
Newest Review: ... also indicates how many weeks since conception occurred showing either as 1-2,2-3,3+ weeks. This pregnancy test is very easy to use. It al... more
Clearly pregnant...but just how far along am I?
Clearblue Digital Pregnancy Test with Conception Indicator
Member Name: sandemp
Clearblue Digital Pregnancy Test with Conception Indicator
Advantages: Clear, easy to read results.
Disadvantages: Expensive, conception indicator not exactly accurate
Each test is wrapped singly in a foil packet which is marked with an expiry date and a somewhat more comprehensive than is usual instruction leaflet in included in the pack. I found the foil packets easy to open, even without an defined "tear here" notch. Rather than being a simple strip that you dip into a pot of urine, these tests are of the cartridge variety and while you can dip them in a pot of pee (for 20 seconds), the seem to work best by holding the absorbent tip hiding under the cap in a flow of urine for 5 seconds. One thing that did strike me is that these tests are far heavier than any other pregnancy test I have used, even other digital tests. Once the absorbent tip has soaked up the pee, it activates the battery and an egg timer starts flashing in the fairly large LCD screen. It can take anything up to three minutes for the definitive pregnancy result to appear and then it may take up to another three minutes for the conception indicator to do it's stuff. Clearblue state that this test is 99% accurate at detecting pregnancy on the day that your period is due and the conception indicator is 92% accurate. The actual pregnancy indicator accuracy falls dramatically the earlier the test is taken, dropping to 55% four days before your period is due.
As with all pregnancy tests these work by detecting a hormone that is generally only excreted by a pregnant woman. This hormone hCG is excreted by the embryo after it embeds in the womb in ever increasing amounts (in a "normal", singleton pregnancy these levels should near enough double every 48-72 hours) Very early pregnancy tests can pick up this hormone at levels as low as 10mui, meaning they can pick up pregnancies as early as 6 days before the period is due. While I cannot find any information on the instructions about this test's level of sensitivity I have read that it is 25mui, which is why it is recommended to use it only on the day your period is due.
When you go to the doctor or midwife, how far into your pregnancy you are is measured from the date of your last period, but these tests give a time based on when the egg actually met the sperm, which is generally around two weeks later. This means that if it displays 1-2 weeks then you are most probably 3-4 weeks pregnant, when it displays 2-3 weeks then you are 4-5 and if it displays 3+ then you are more than five weeks. Due to something called the hook effect if you are more six or so weeks pregnant the levels of hCG in your blood may become so high that test lines become lighter, which as the conception indicator part of this test works by comparing two test strips of different sensitivity, means that it may give strange results at that point in pregnancy.
I had already had positive tests over several brands a couple of days before I felt brave enough to use one of these exorbitantly expensive digital tests, and so I took the test three days before my period was due, already knowing that I was pregnant. That first test I used by dipping in a pot and twenty seconds seemed a very long time. Once I had thoroughly soaked the tip, I replaced the lid and placed the test horizontally on a flat surface to wait for a result to appear. The egg timer immediately started flashing, but it took a long time for the pregnant result to appear, near enough the full three minutes and then about the same amount of time for the conception indicator to flash up 1-2weeks. As I was 3 weeks and 4 days pregnant at the time, this was an accurate result, in fact it was actually 10 days since I had conceived.
I took a further test two days later, when I was not quite four weeks and was surprised to get a 2-3 week result. While I was pleased that there was a very definite progression in my hormone levels, I was a little confused. The most recent of these tests that I took was yesterday when I was 4 weeks and 1 day, giving me a result of 3+, which is very obviously not accurate, but still reassuring. Perhaps I just produce far more hCG than the average pregnant woman (which would explain why I feel so ill), or maybe there is more than one baby snuggling down (we'll find out when I have a reassurance scan in 2.5 weeks), but I'm definitely not 5 weeks yet.
While I wouldn't recommend these tests as a first test for pregnancy, they are brilliant for giving a very clear indication of pregnancy after having confirmed it with those tests where you have to squint to see a second line. With the conception indicator, the tests also give a very clear indication that hormone levels are rising, which if you have suffered losses can give a little peace of mind. However, I personally have not found the conception indicator to be that accurate, but as I've said before, that is probably down to my high hormone levels. My only real problem with these tests is that the result does not last forever, being digital the internal battery only lasts a finite length of time. Clearblue, state this as being at least 24 hours, although in my experience it is closer to 36-48 hours, which is plenty long enough to take a photo. So, as long as you only pay the Amazon asking price of £7.70 for two and not the Boots of £10.99 for one, I'm giving the Clearblue Digital Pregnancy Test With Conception Indicator four stars out of five.
Summary: There are cheaper options, but the conception indicator is quite reassuring