The pregnancy test or pregnancy tests have a 98% effectiveness, as long as you follow all the instructions. For greater certainty, some described the information regarding sensitivity to a certain amount of hormone in the urine. For example, if it says on the cover that perceived 25 mUl/ml (milli international units per milliliter of urine) means that it is more sensitive than one that detects 50 mUl/ml.

One of the alternatives in the market is the ClearBlue of the laboratory Novartis, which is a pregnancy test for home use, that can be used from the first day late, at any time of the day, and is over 99% reliable. In addition it can be used up to 4 days before the arrival of the period.

Another option is to Homeclinic laboratory Arthus detected quickly and accurately the hormone chorionic gonadotropin (hCG) is present in the urine of the pregnant woman.

Has a sensitivity of 40 U. I./l. and a precision of 100%. To use it, place 5 drops of urine in the cavity of the sample. Wait 4 minutes and see the result.

Analysis of blood

If you have any doubts regarding the reliability of the test home in the confirmation of a pregnancy, or if it was a false negative, it is better to do a blood test. Once you leave positive or if you do not get your period despite a negative result, you need to go to a doctor, who will give the order for a blood test.

This type of analysis determines the amount of the hormone hCG in the blood, not only the presence.

A nurse will draw from a vein, usually in the forearm, a sample of blood. To do this they will clean the area from where you will extract the shot, and, in the case of not having the vein visible, put an elastic to pressure and show because you will stand in the blood flow and is full of blood.

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While the sample is drawn is removed the rubber band and once that is removed the needle, put a band-aid.

The outcome of the review will be ready 24 hours after you have taken the sample.

Value of tests pregnancy

The home-made samples have very different prices, it's all going to depend on the brand and the manufacturer. Generally, the more economical have an approximate value of $3,000.

In both, the blood tests to know if there is a pregnancy, will vary according to the place the make, but the cost round $5,000.

The test home pregnancy is the easiest method to know if you are expecting a baby. Measures the presence of the hormone Human Chorionic Gonadotropin (hCG) in the urine, because this can only occur when the tissue trofoblástico, that is the future placenta begins to produce once the embryo is implanted in the uterus of the future mother.

This hormone reaches the blood for about six days after of the occurrence of fertilization, but in low amounts. The production of hCG doubles every two days, between day 10 and 15 from the time of fertilization since it is possible for the test to recognize the pregnancy. Therefore, even if you make the test the next day having sex without protection, the analysis will not show pregnancy, and give you a false negative, even if you have fertilization.

How does a pregnancy test?

The you have to do is buy one in any pharmacy, and to check that it is expired. If you already had 1, but what you put in a place with high humidity or exposed to environmental conditions that may be unfavorable, it could have been damaged, so it is best used 1 new.

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The best time of day to do this is during the morning, because the hormones are more concentrated in the urine. If you do the test at a different time, don't drink a lot of liquids before, because it can dilute the hCG hormone and in addition, it is necessary to have a retention of at least three hours before doing the test. Remember that you have to read the instructions carefully, because not all work the same way.

In regard to the taking of the sample, depending on the brand you buy will be the method that you use. In some tests it should fill with the urine a clean, dry cup, and then you enter a strip sensitive to the hormone; however, others require that the sample be taken with a dropper and put in the hole of the test of pregnancy. There are also other tests in which the urine is placed directly.

Once taken the sample, you must wait at least three minutes to bring up a coloration in the form of a line or a cross, which indicates the presence of pregnancy. This will depend on each brand.

If the test comes out negative, you should wait at least thirty minutes to confirm this result, because it can get positive slower.

In addition, if after performing the test continues without getting your period, do again the scan after a week and with the first urine of the day. At times, it may be an ectopic pregnancy, ie, which develops in 1 of the fallopian Tubes and is usually not born a baby. For this reason, the test is not recognized; in these situations you should visit a doctor, because it is necessary a special treatment.

Read also: how When to stop birth control to get pregnant?

Some people think that alcohol consumption affects the outcome, but this is not so. Neither can the medications alter the recognition of pregnancy in the test, except for those compounds for the Human Chorionic Gonadotropin hormone.

Sometimes the result can be a coloration almost imperceptible, but if you see the mark indicated by the test, by discolored, the result is positive.

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