In fact, the device for determining pregnancy is an indicator that responds to the presence of gonadotropic chorionic hormone in the urine, which is characteristic of pregnancy. This substance is produced by the fetal membranes already from the first day after implantation, within a week it accumulates in the body in the amount to which the test strip reacts.
• There are several types of pregnancy test, but the principle of their action is the same.
• The most affordable are conventional strip strips.
• There are also tablet and inkjet test systems, electronic devices for detecting conception.
• The most accurate and reliable are inkjet diagnostic systems. They are easy to use and do not require a separate set of urine, the test is simply substituted under the stream, and then the test results are read.
• On all tests there is a special indicator, which, upon contact with urine, in the presence of human chorionic gonadotropin hormone, appears as a bright stripe, which means that the patient is pregnant.
• HCG levels double every 48 hours from the day of implantation. Therefore, by the time a delay is detected in the blood, a certain level of this hormone accumulates, to which the test indicator reacts.
• If the hCG content is low, then only one control strip appears on the strip test, but when its level rises to 15-25 mIU / ml, the second test strip also appears.
• Sometimes such testing shows a faint line, which girls sometimes perceive as a malfunction of the strip test. But there is a perfectly understandable explanation for this.