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Pregnancy Test Accuracy
Varieties of pregnancy tests are a many in every country, in every city they are different, but the goal remains the same, and the main point is the pregnancy test accuracy. They are intended to identify human chorionic gonadotropin (HCG) in urine by immune chromatographic analysis. HCG (a glycoprotein with a molecular mass of 36.7 kD) produced by the developing placenta begins soon after conception, the concentration of the hormone in the blood during the first trimester of pregnancy is increasing. Sensitivity Pregnancy Test detects HCG at concentrations of 10-25 mME / ml, which provides diagnosis of pregnancy from day one expected, but never to menstruation, that is, 10 to 15 days after fertilization (as practice shows - in some cases, the test can give a positive result is four days before the expected menstrual period, but not all - it depends on the timing of ovulation, fertilization and embryo implantation in the uterus). The principle of a pregnancy test HCG Test strip coated with reagents (labeled with antibodies to HCG) on the test and control sites. When testing urine, penetrating through the capillaries strip reaches the test site. In the presence of HCG in the urine, the reaction products were detected in the test zone of a clear color line, which suggests the presence of pregnancy. If the sample does not contain HCG, a band in the test zone is not observed. The kit includes: * Strip-bar in the security package; * Package with an absorber of moisture (in testing is not used). Terms of diagnostics and storage: * Do not use after the expiration date printed on the protective package; * Keep a pregnancy test (set) should be at a temperature of 2-28 C; * Before testing urine samples and the components of the test set must be brought to room temperature. Testing can be done at any time (in the early stages is recommended to use first morning urine, as the concentration of HCG in her most high). Collect urine sample in a clean, dry container. The sample must not be frozen. The sample cannot be shaken. Be stored in a refrigerator at 2-6 C for up to 24 hours. Quality control Internal quality control is a strip in the control area (the appearance of distinct color bands on it indicates that the functional state of the strip-test). If the test after the correct action not a single strip - this means that the test was defective, its shelf life has expired, or it was stored in poor conditions. Limitations Follow the instructions attached to the test. Some diseases, such as ovarian tumors, can cause incorrect results. Pregnancy tests do not warn about an ectopic pregnancy. After receiving a positive result should consult your doctor for clarification uterine pregnancy and conduct further examinations and tests given to all pregnant women. A negative result, if the monthly not come in 3-4 days, it is recommended to repeat the test, as in the first weeks of pregnancy, HCG levels double every day and some days the test will be more responsive to your level of HCG in the presence of pregnancy. For a more accurate diagnosis can be a blood HCG - it more accurately, as in the urine HCG levels are usually lower than in the blood, so for a long time, the test can be silent or show a weak stripe.
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My Pregnancy Guide -- Week by Week Pregnancy Website
Online pregnancy guide! Getting pregnant, pregnancy, labor and childbirth, breastfeeding, & baby care! Pregnancy calendar, morning sickness, signs of labor, breastfeeding support, pregnant belly, pregnancy articles, baby care, pregnancy myths, pregnancy health, & more.
Mypregnancyguide.com ~
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