Thinking of a baby gender test to find if you will have a baby boy or girl? Several tests are available but many cannot be relied upon as they do not have the necessary level of accuracy for complete peace of mind. DNA testing is the most accurate and scientific way of going about a baby gender test. These tests can tell you the sex of your baby towards the end of your first trimester of pregnancy. The following are the two DNA tests currently available on the market.

Find out your baby’s gender with a blood sample

A few blood stains on absorbent paper is one method currently available to establish the sex of a baby. This is far easier and simpler than having to undergo amniocentesis (although it is unlikely any mother would undergo an amnio just for baby gender)- it can also tell you the baby’s gender far earier than your 18th week ultrasound.. The sample can easily be collected using a sterile finger lancet. The accuracy of this type baby gender testing is of around 95%. Companies offering this type of test will provide a kit which will contain lancets (sterile, needle-like instruments) as well as the special paper needed to collect the drops of blood. Samples are collected by pricking the finger tip and allowing a few drops of blood to collect on the absorbent paper.

The science behind these DNA tests

Gender prediction tests using blood is based on the analysis of fetal DNA in maternal blood or maternal urine. Fetal DNA finds its way into the mother’s blood stream through the wall of the placenta. The more pregnancy advances, the higher the quantity of fetal DNA in the expectant mother’s blood stream. Blood eventually gets filtered in the kidneys and the fetal DNA in its gets washed out along with other byproducts. Scientists are able to determine the sex of the baby by using a process called polymerase chain reaction (PCR). This process allows analysts to produce a huge number of copies of the genetic material being analyzed: if they detect the presence of Y chromosomes they conclude the baby will be a boy. If they find no Y chromosomes, then the baby will be a girl.