Pregnancy - is a pleasant period.During this time a woman has a baby at heart, who loves from the first minutes of life.If conception has not occurred according to plan, it will likely have the fair sex there is no question of when a pregnancy test will show the exact result.This can not be said about those women who are eagerly awaiting the onset of fertilization.They do not sleep at night and transferred several devices for the diagnosis of pregnancy in the day.Try to understand why there are different results of a pregnancy test.And when to conduct research to get the most accurate results and answer the main question: whether there is a pregnancy?
principle conception
On average, once a month in a woman leaves the cell from the ovary.If this happens during sexual intercourse, it will merge the egg and sperm.From this point we can assume that the birth took place.During this period, a pregnancy test result will give 100% negative.
A few days later the fertilized cell, continuing to share, down in the genital organ and securely fastened to its wall.From this day you can already talk about the pregnancy took place.
The principle of the strip strips
Perhaps the fertilized egg is already in the uterus and produces a pregnancy hormone, but the pharmacy test still shows a negative result.Why is this happening?
very simple.On the test strip for domestic use, there are two lines.They are not visible when the test has not been carried out and the system dry.As soon as the reaction with the material collected for the study, the control bar appears bright color.It can be red, green or blue.It depends on the preference of the manufacturer.The line indicates that a manipulation has been carried out correctly.If present in the urine of women in pregnancy hormone required amount, the manifest and the second line - test.It can be very bright if high levels of hCG.Also pale line is in the case when the urine contains a small amount of the substance produced during pregnancy.
production of hormones of pregnancy
exact pregnancy test result can be obtained when the concentration of a substance produced by the fetal egg reaches the required level.
From the first hours after fertilization allocated human chorionic gonadotropin.First, the substance enters the bloodstream and then only in urine.Every day hormone level increases and reaches its maximum for the second trimester of pregnancy.
When the pregnancy test shows the exact result?
Many women are interested in this issue.Surely every woman conducted a study at home even before a missed period, hoping to get a reliable result.We make an elementary calculation and try to figure out when a pregnancy test will show the exact result.
example, women standard cycle length is 28 days.In this case, the output from the follicle cells occur on average at 14 days.Since dividing cells after fertilization takes a few days in which to get into the genital organ, the implantation occurs 3-5 days after the merger of chromosomes.There are cases where the process takes up to 10 days, but usually it is faster.So, if the rupture of the follicle was on day 14, the attachment of the ovum occurs for 17-19 minutes.Take for example the shortest possible time.If chorionic gonadotropin produced began on day 17 of the female cycle, doubling every day, the amount will be 32 mIU / ml on day 21-23 of the cycle.
Most strip strips for home use have a sensitivity of 20 to 30 mIU / mL.Once the level of human chorionic gonadotropin reach this amount, the woman will be able to see the positive pregnancy test.
Incorrect result
In some cases, home testing methods may give false results.Why is this happening?
positive results and the absence of pregnancy
Two strips on the machine to test, you can see if it is poor quality.Often manufacturers of cheap test uses late or do not meet the standards of the reactants.The use of such strips can show a positive result, when there is no pregnancy.
also false positive result occurs in women during hormonal failure.To produce human chorionic gonadotropin may be a variety of tumors of the adrenal glands and the female genital organs.
Negative: Can not show a pregnancy test?
Similarly, as in false positives, cheap tests with poor quality reagents may give a wrong result.In this case, the woman thinks that conception has not occurred at the time when her body is already evolving and progressing new life.
Also, the apparatus for diagnosing pregnancy may show a negative result in the case where the required level of the hormone has not yet reached his level.That is why most manufacturers recommend a test to conduct research only after a delay of menstruation.Indeed, in this period, in the urine of women already have a sufficient level to establish the substance of conception.
test result when an ectopic pregnancy may also be false.When the fertilized egg for one reason or another is fixed in the abdomen, on the ovaries or fallopian tube pregnancy hormone release is slower.It is not increased twice every day, and about 0.5 times in every two-three days.That is why, even after the delay test result when an ectopic pregnancy may be negative.
can not ignore the fact that in the urine of human chorionic gonadotropin levels considerably lower than in the blood of pregnant women.
How to choose a pregnancy test to get an accurate result?
worth recalling that all devices for the diagnosis of pregnancy are divided into:
- tablet;
- jet;
- electronic.
Conventional Tablet tests are the budget option to use.They have a sensitivity of 25-30 mIU / ml.Because of this, an accurate result can be obtained only after a delay of menstruation.
jet devices for diagnosis are more expensive, but they are more convenient to use and have a high sensitivity.Pregnancy tests are shown when the amount of hormone in urine reaches 10-15 mIU / ml.
Electronic devices are the most expensive, but they are more reliable.For example, the results of the pregnancy test «Clearblue» will be accurate even before the delay.The manufacturer recommends that a study had 4 days before the onset of a new cycle.
Conclusion Now you know when a pregnancy test will show the exact result.Every woman knows your body like no other.That it can be calculated as accurately as possible the day that ovulation has occurred and conception.Using the example for the calculation of which is shown above, you can find out what day of the cycle is better to do research to get the most accurate results.
