Boy or girl, this is one of the questions parents yearn to know. The sex of the baby can be revealed through the echoes or ultras from the 13 weeks, but there is an examination that allows to know with certainty the sex of the baby from the 8th week of pregnancy.
The Fetal Screening is a blood test that helps parents know the baby’s sex earlier. It’s a painless exam but a little expensive.
Most parents have to wait to know the sex of the baby that is inside the mother, some lucky ones know in the combined screening of the first trimester, some only later or even at the time of delivery, depends a lot on the position of the baby.
How Does the Fetal Screening Work?
It is a blood test that can be done from the 8th week of pregnancy.
It is a non-invasive examination, a small sample of the mother’s blood is collected. Then a DNA test is done.
The basis of the examination is the existence or not of the Y chromosome in the withdrawn sample. That is, the woman has two X chromosomes, if in the sample there are Y chromosomes, the baby is a boy. If the sample does not have Y chromosomes, the baby is a girl.
The fetal sexing examination is almost 100% reliable, the only indication is to be done after 8 weeks of gestation, to reduce the risk of error.
Fetal Sex Screening in Twin Pregnancy
The test can be done in a twin pregnancy, in the case of univiteline twins, the test indicates if it is 2 girls or 2 boys.
In the case of a twin pregnancy of biviteline twins, the existence of the y chromosome indicates that at least one of the babies is a boy, in the case of its absence are 2 girls.
Cost of a Fetal Sex Test
The cost of the exam is a bit high:
In Brazil the price varies according to the region of the country, between R $ 260,00 and R $ 850,00.
In Portugal it varies from clinic to clinic and costs between 100 and 120 euros.