Home pregnancy tests work by detecting the hCG hormone in your urine, however, in some circumstances, such as when you are having fertility treatment or have medical conditions, you may be asked to head for a blood test with your doctor. Before administering a pregnancy test, read and follow its instructions step by step. Here is an outline of how it works: Read the directions that come with the test thoroughly before starting the test, and follow every step exactly. Urinary hCG shows a remarkable uniformity in its rise during early pregnancy. Particularly if hCG concentrations are referenced to the time of ovulation or conception, the high variability of hCG concentrations reported for early pregnancy in some studies disappears. Dating the gestational age based on the LMP is very unreliable. Irregular cycles, early pregnancy bleedings, previous use of hormonal contraceptives or breastfeeding are common causes which can obscure the time of conception and the gestational age. Since reliable normograms of urinary hCG concentrations already

When no line appears on a test strip, this indicates invalid results and you should retake your tests with different strips. Reading pregnancy test results within the timeframe specified in their instructions is vital in making accurate or valid interpretations. This hormone comes along the urine only in case of pregnant women. A pregnancy test detects this hormone in urine. This pregnancy test is qualitative and it only detects hCG.If you choose to use a traditional pregnancy test instead of a digital one, there is always the chance you could get an evaporation line, often called an evap or an indent line. That is because every pregnancy test comes with two lines: a control line and a test line.

Ideally, your doctor will do both an ultrasound examination and a serial HCG test, which involves two quantitative HCG blood tests to be taken two days or so apart to see if the appropriate rise in HCG is occurring. Which Pregnancy Tests Give the Best Early Results?Ease of use - Most pregnancy tests involve measuring the level of hormone present in your urine, but some are easier to use than others. Most home pregnancy tests tend to have a plastic casing around them, but you can also buy cheaper pregnancy strips, such as One Step, which have no casing but can be just as effective at detecting hCG. When testing, you would need to dip an uncased pregnancy strip into a pot of urine rather than attempt to wee on it. The hCG antibodies present on strip form an indent line. The indent line of the test is made of the detector particles. 9) One Step Pregnancy Test invalid If your pregnancy test shows a positive result, this is what could be happening. 1. It’s Truly Positive Although the amount of HCG in your body doubles every two or so days, it can take a few days for that line to go from faint to dark (2). Levels of HCG can be detected in the urine after about two weeks from conception. The levels will reach their maximum at 8-11 weeks of pregnancy.

Another cause of observed false negative results for home pregnancy tests can be due to unusually high concentrations of hCGβcf, the core fragment of β-hCG, which can occur in later stages of pregnancy 39. Tests recently cleared for marketing in the USA by the Food and Drugs Administration have been required to demonstrate that they do not produce false negative results when used in later pregnancy. European guidelines require manufacturers to do their own risk assessments; however, specific performance requirements are not defined in the directive.One Step Pregnancy Test line faint is another result because you took the test too early. One Step Pregnancy Test faint negative line means that you could be using a very dilute sample of urine. Early morning urine has a high level of hCG and is suitable for pregnancy test. The test line not getting darker is the final stage of result. The test light line will not get darker by keeping it for long. A very faint line for positive results is also a positive result. After getting a thin line you must repeat the test after few days. 7) One Step Pregnancy Test evaporation line

We know just how important it is to be able to trust the brands you are using for such a key moment in your life. For that reason, we thoroughly researched and vetted the brands and pregnancy tests included in this round up to ensure they were well-regarded by medical professionals, with many of these tests being recommended and rated by doctors and family planning clinics. In most cases, medics agree that whilst they may vary in sensitivity levels, home pregnancy tests are generally an accurate way to detect pregnancy, so long as they are used correctly. Most pregnancy tests don’t ask you to avoid activities or change your lifestyle. The only medication that may interfere with your results is fertility medication containing HCG. During the first trimester, the pregnancy hormone increases from less than 5mIU/ml to over 100,000mIU/ml, and the further into your pregnancy you are, the more present this hormone will be in your urine. How accurate are home pregnancy tests?It is rare but true. If you take any fertility drugs your body will have hCG without being pregnant. You’ll get a false positive result in this case. 5) One Step Pregnancy Test negative Depending on your plans for your pregnancy you will need to take different routes. If a positive test is good news you need to book an appointment with a midwife between 8-10 weeks going by your LMP (last menstrual period). If you’re not sure you can simply self refer to your local midwifery services or call your GP for further information.