What it measures
- Fetal Y-chromosome DNA in maternal blood
How does an early gender blood test work?
During pregnancy, small fragments of your baby’s DNA circulate in your blood. The test looks for DNA from the Y chromosome, which only boys have. If Y-chromosome DNA is found, you’re expecting a boy; if not, a girl.
Getting an accurate result
Accuracy depends on there being enough of your baby’s DNA in your blood, which increases as pregnancy goes on. Knowing your dates helps; if you’re unsure how far along you are, a dating scan first is a good idea.
Want to see your baby too? The Double Discovery Package pairs this test with an early gender scan.
What’s included
- Single blood sample from mum
- Baby’s sex result
- Clear explanation of your result
Who it’s for
- Parents who can’t wait to find out
- Planning a gender reveal
- Pregnancies from 6 weeks
How to prepare
- Drink plenty of water beforehand; it makes the sample quicker and easier to take.
- You don’t need to fast.
- Bring your pregnancy dates or a scan report if you have one.
Early Gender Blood Test: your questions
How early can I find out my baby’s gender with a blood test?
From 6 weeks of pregnancy with our Early Gender Blood Test.
Does the test work for twins?
It can tell you whether at least one baby is a boy, but not the sex of each baby. Let us know if you’re expecting twins.
Information on this page is general and doesn’t replace advice from your GP, midwife or consultant. If you feel unwell or are worried about symptoms, contact your GP, call NHS 111 or, in an emergency, 999.