How are DNA Samples Collected for a Baby Gender Test

How samples are collected for a gender predication test very much depends on the type of gender test you choose. There are gender tests which are DNA based – such as gender tests with samples of maternal blood or maternal urine. There are other home baby gender tests which claim to find traces of male or female DNA in a sample of maternal urine to determine the gender. The tests that will be discussed are DNA tests.

A word of warning: you should ensure to choose a test that has been scientifically validated – this means that the test has undergone proper clinical trials under the right conditions and that research has consistently shown results to be correct. Steer clear of baby gender old wives tales – these have no scientific backing whatsoever and although people do claim that tests such as the cabbage test worked for them, it is purely due to chance.

Sample collection for Gender Test with Blood

The gender prediction test with a maternal blood sample is done by using a home sampling kit. The kit contains special absorbent paper as well as lancets (a lancet looks very much like a needle). The lanced is used to prick the tip of the finger. Once the first drop of blood gathers at the point at which the lancet was inserted into the skin, it is time to get the absorbent paper and allow some blood drops to fall on it. The blood sample provided must then be returned for testing. The test can be done at around 9 weeks of pregnancy. Basically the science behind the test is sound and is as follows: the mother’s blood contains traces of fetal DNA which increase as pregnancy progressing. The blood taken on the absorbent paper will contain Y chromosome markers if the expectant mother is carrying a boy. In terms of accuracy, the test is 95% accurate.

Sample collection for Gender Prediction Test with Urine

Sample collection for a gender prediction test is done by means of a home kit. Inside the kit you will have a urine collection cup, special urine preservative and nitrile gloves. There is no need to fast or collect urine at a particular time of the day. The test can be done at 9 weeks of pregnancy and has a success rate of 99%. The science behind the test is analogous to the gender test with a blood sample. Fetal DNA finds its way into the mother’s blood stream but once the blood gets filtered in the kidneys, the fetal DNA gets flushed out in the maternal urine. The urine sample can then be analyzed to confirm the presence of y chromosome markers- only males have Y chromosome which would confirm that the pregnant mother is expecting a baby boy.

How do the two tests compare?

Both tests using a DNA replication and amplification technique known as PCR, polymerase chain reaction. Gender testing with blood requires a finger prick- not a very dreadful and painful sampling procedure but to say the least very uncomfortable, especially when done by yourself. When it comes to a urine baby gender test the sample collection could not be easier and more practical- a urine sample in a urine specimen cup. The accuracy of the baby gender test with urine is also higher by 4%. Urine testing is 99% accurate whilst gender testing with blood is 95% accurate. That 5 % margin does leave room for error, although it must be said, chances are very small. Overall, the gender prediction test with urine is a winner and the test to go for.


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