Pregnancy Test
Tags: Pregnancy, Pregnancy Test
Commercially available for several years, pregnancy tests do you represent a simple, fast and effective way to confirm or rule out pregnancy. In addition to shortening the waiting time required for the establishment of pregnancy, allowing you to personally manage the performance of the test without having to resort to the doctor or laboratory analysis, reduce anxiety and apprehension related to the uncertainty of the response. The advantage of these tests is therefore in the precocity and the ability to know before you go to the doctor if the delay with a good chance of pregnancy.
The pregnancy test immediately be bought in pharmacies or supermarkets, and are based on the identification of chorionic gonadotropin in the urine, unlike the levy to assess the presence of the same hormone in the blood. The placenta produces chorionic gonadotropin, known as HCG, a glycoprotein composed of two parts, one called the other alpha and beta, which is detected in pregnancy tests.
This hormone is normally produced only during pregnancy and is therefore very difficult to be carrying a false positive test. A false positive could result from a miscarriage, was done without any feedback from the woman, or the beginning of menopause, or whether specific substances are taken against infertility, or if after a period of less than two months after birth above.
Tests are usually two in the box to allow repeat testing to confirm the result after an interval of time. They are simple plastic stick, challenged as a pen containing a test strip to chorionic gonadotropin.
To verify their presence is sufficient to soak for a few seconds the stick with the normal flow of urine, preferably the first morning urine hormone that is richer, and after a few minutes, if the presence is confirmed, the stick on the window will appear the line or symbol that denotes the positive test.
Some brands on the instructions indicate that the tests can even detect positivity already eight days after ovulation, it may be that in some cases happen, but can take place so early so-called false negatives. Not all pregnancies in fact, the hormone is detectable so early, so it is generally more appropriate to wait a few more days, so that the probability of correct outcome grow considerably after the first day of delay.
The reliability of the result is still regarded as complete from the seventh day overdue, this means that the hormones of pregnancy at that time will be ‘necessarily’, otherwise almost sure you can rule out pregnancy.
But even then in rare cases may occur more false negatives, in the case, you should consult your gynecologist, who will probably recommend blood testing.
Not all tests have the same sensitivity means that some are able to detect a lower concentration of hCG in blood and therefore may give positive results earlier, others require greater amounts of hormone, and therefore more time from the date of ‘ ovulation. you should not drink a lot before the test, because the water could dilute the urine and excessively distort the result.
Costs vary, but in principle the box with two tests cost less than $ 20, one with a half. The brands on the market are many, among them there are few differences, perhaps the main lies in early reading on the basis of hormone concentration. The instructions typically declare the reliability from the first day late, others require at least seven days from failure to complete the cycle to be sure of the result. We say that in many cases the first day of delay will be sufficient to read the actual outcome, but to be sure, especially in case of negativity, you should wait for seven days.
Among the most common confirmation note 3, Diagnosis, First Response, Clearblue, Predictor, Artsana Angelini, all go well, but if you encounter other brands, according to the times and the directions carefully you will have a very reliable result.
Below is a list of the sensitivity of some pregnancy tests, most obviously the number is low are more sensitive because it indicates the amount of urine bhcg they can detect.
Then 25 mIU / ml means that it becomes positive if at least this amount of bhcg urine, so if you test early predictor of better analysis.