You’re pregnant, and the question is already in your head. When can I find out? Is it too early to ask? Can I trust the result? Finding out the sex of the baby is one of the first things expectant parents want to know, and the answer depends on which method you choose and how far along you are.
How Early Can You Find Out the Sex of Your Baby?
Earlier than most people expect. A blood test called NIPT can tell you as early as 10 weeks of pregnancy, with more than 99% accuracy. It works by detecting fetal DNA in the mother’s bloodstream and checking for the presence of a Y chromosome.
NIPT is non-invasive. There is no risk to the baby. It also screens for chromosomal conditions like Down syndrome at the same time. Not every pregnancy qualifies for early NIPT coverage, so check with your provider about timing and cost.
If you are not offered NIPT, the next option is an ultrasound. Most parents find out the sex this way, between 18 and 22 weeks, during the routine anatomy scan. The sonographer checks the baby’s organs and, if the position allows, the genitals. Accuracy at this stage is 95 to 99 percent, but a hidden or awkward position can still make the result uncertain.1
What If You Need a More Definitive Answer?
Two genetic tests give near-100% accuracy: CVS and amniocentesis. Both are typically recommended only when there is a medical reason, because both carry a small risk of miscarriage.
CVS (chorionic villus sampling) is done between 10 and 13 weeks. A small sample is taken from the placenta and tested directly against the baby’s genetic material. Miscarriage risk is approximately 0.5-1%.
Amniocentesis is done between 15 and 20 weeks. It collects a sample of amniotic fluid. Miscarriage risk is approximately 0.35 to 1%.
If you conceived through IVF, preimplantation genetic testing (PGT) can determine sex before an embryo is implanted, with near-100% accuracy.2
Can the Doctor Get It Wrong?
Yes, occasionally. Ultrasound accuracy depends on the baby’s position, the equipment quality, and the sonographer’s experience. If the baby is turned or the view is blocked, a mistake can happen. Error rates run approximately 1 to 5% at 18 to 22 weeks, and higher in earlier scans or poor imaging conditions.
Genetic tests like NIPT, CVS, and amniocentesis are far less likely to be wrong because they test the baby’s DNA directly, not a visual image.
If you receive a result you are unsure about, a follow-up scan or confirmatory test is always an option to discuss with your provider.
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Do Food, Nausea, or Family History Predict the Sex?
No. The sex of your baby is determined by the sperm at the moment of conception. A sperm carrying a Y chromosome produces a boy. A sperm carrying an X chromosome produces a girl. Nothing that happens after conception changes this.
Food cravings, morning sickness severity, family patterns of boys or girls, and sex position are all myths. No scientific evidence supports any of them as predictors of sex.3
The only way to know your baby’s sex is through a medical test.