so that they might be attracted to brand brand new organizations, like SneakPeek, which claim to be able to determine your baby’s sex with 99% precision at the beginning of the very first trimester, with just a straightforward bloodstream draw.

These brand brand new tests depend on what’s called mobile free fetal DNA (cffDNA)–small fragments of DNA shed through the placenta into the bloodstream.

Regrettably, relating to a 2011 meta-analysis posted in JAMA, several of those ongoing organizations overstate the precision of these tests. The meta-analysis discovered that none of those cfDNA-based tests are accurate before 7 days. (The meta-analysis also examined urine-based tests. None of those had been accurate.)

Between 7 and 20 days, precision of these blood-based tests ranged from 95-98%, according to the particular methods used additionally the baby’s actual intercourse. (The tests had been more accurate once they make use of a DNA amplification method referred to as real-time quantitative polymerase string response.) Just after 20 days had been the tests that are blood-based% accurate.

Just how do Blood-Based Tests for Fetal Intercourse Work?

During maternity, tiny fragments of one’s baby’s DNA shed through the placenta to your blood supply. These fragments cffDNA, first discovered in expectant mothers in 1997, are detectable in your bloodstream beginning around 7 months of being pregnant, while increasing in amount throughout maternity.

Within hours of pregnancy, your baby’s DNA fragments degrade and disappear from your own blood supply. Read more