Baby Gender Testing with Maternal Urine

The most advanced method for baby gender testing involves analysis of maternal urine. Yes, this is indeed surprising and might seem too simple to be true. But science has jumped hurdles over the past 2 decades when it come to any test carried out during pregnancy.

Till not long ago, there was no way of scientifically knowing the sex of the fetus. People often relied on old wives tales for baby gender – methods and techniques with no scientific research behind them and which will anyway provide a 50% success rate, given that baby gender can only be one of two options.

Boy or Girl? How does this recent baby gender prediction test work?

The placental wall is a point of exchange between mother and child for everything essential to keep the baby alive, including of course, oxygen and nourishment. It is here that the mother’s blood and the baby’s blood come into contact with each other. Fetal cells, just like our own cells, die and get replaced. In our case, the dead cells might just fall off our skin but fetal cells will find their way into the maternal blood. The amount of fetal DNA will increase the more weeks of pregnancy roll by. One of the reasons is that the fetus increases in size and naturally has a larger surface area. This means that the number of dead cells will obviously increase and results in higher levels of fetal DNA in the maternal blood stream.

How does the fetal DNA get into the maternal urine?

The answer to this question is “through the Kidneys”. Your kidneys are two very important bean-shaped organs located in your back. The kidneys filter huge quantities of blood at an extremely high rate- they are extremely effective at separating waste products from the blood. Any waste material and water leave the kidneys and go into the urinary tract and eventually get expelled as micturate. Fetal DNA is one of the waste products which gets filtered out with the maternal urine.

Baby gender testing with maternal urine is a totally risk free and convenient way of discovering the sex of the baby. The accuracy of the test has been shown to be 99%. The test is done via a home kit in which the mother provides a urine sample which she must then return to the laboratory for analysis. The laboratory will them analyse the sample to check whether there are any Y chromosome markers in the sample. Any Y chromosome specific markers detected can only be attributed to a male fetus. Absence of any Y chromosome markers clearly indicated the unborn baby will be a girl. To understand sample collection for a baby gender test, click here.

An important precaution with baby gender testing

Baby gender testing is a DNA test that relies on detection of Y chromosome specific markers in the maternal urine sample. The test is extremely accurate at locating these genetic markers but it is also extremely sensitive to the presence of any male DNA. This means that if a male has come into contact with the sample or the mother has had intercourse within 72 hours of doing the test, laboratory analysis might pick up the male DNA markers and wrongly attribute them to the fetus and provide a wrong result. It is important to follow this precaution for baby gender testing.


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