Hannah PRC pregnancy tests are highly sensitive urine-based tests that can be confidentially used to indicate pregnancy. They are laboratory-quality, with a 99.9% accuracy rate. This page is designed to provide information about using and reading the tests.
What is hCG?Human chorionic gonadotropin, or hCG, is a protein hormone produced by the placenta.
What does hCG have to do with pregnancy tests?Urine-based pregnancy tests analyze the presence of hCG. The appearance and increased levels of hCG provide an excellent indicator of pregnancy. hCG is released into the mother's circulation almost immediately after implantation (5-8 days after conception). hCG is produced in minute amounts and then, rising exponentially, the concentration doubles approximately every 2.2 days.
Do all pregnancy tests have the same sensitivity to hCG?No. There are many types of tests on the market for both professional and home use. They have different sensitivity levels for detecting hCG. Our test, one of the most sensitive urine-based tests available, detects concentrations as low as 20 mLU/ml.
Are the levels of hCG in all pregnant women the same in any given week of pregnancy?No. The production of hCG can vary greatly from woman to woman in any given week of pregnancy with as much as a 20-fold variation in individual levels. Some women with high hCG may come up positive on the test very early, while others with low hCG may not show up until after the first missed period. In a recent study, reported in the Journal of American Medical Association, 10% of 250 women tested had not even implanted by the first missed period. Therefore, their hCG was so low that no urine test could detect it.
How early can Hannah PRC Pregnancy Tests give positive results?Because our test is so sensitive, it may pick up a positive result as early as 7 - 10 days post conception, depending on when implantation occurs and the client's personal hCG levels. If hCG is detected at this early stage, the test line would be expected to be light as hCG levels are just beginning to build.
However, when testing this early, the results should be verified after the first missed period. This is because, although the test picks up the presence of hCG, it does not guarantee a viable pregnancy. hCG may also be produced by an EPL or "early pregnancy loss". This is an embryo which fails to implant properly in the uterus, or is rejected by the uterus. It is followed by a normal or slightly heavier than normal menstrual period, which may be 2 to 3 days late. hCG levels may rise in the week following implantation (second week of conception) like a normal-term pregnancy. When EPL occurs, hCG concentration in the urine reaches a peak 2 weeks after conception then rapidly declines.