What is the earliest way to find out?
For many people, cell-free DNA screening is the earliest noninvasive route that may include fetal sex information, beginning around week 10. Availability, reporting practices, cost, and suitability vary. A home “early gender” blood test is not the same as clinician-guided prenatal screening.
Can an ultrasound tell at 12 weeks?
Some people receive an early guess based on genital tubercle angle—often called “nub theory”—but it is less dependable than later imaging and should not be treated as confirmation. The anatomy scan around 18–22 weeks is a more common opportunity.
How accurate is the 20-week ultrasound?
Ultrasound can often identify fetal sex when the fetus is positioned well and images are clear, but no scan guarantees an answer. Gestational age, position, equipment, operator experience, and local policy all matter.
Sex, gender, and wording
Searches often say “baby gender,” while prenatal tests generally provide information related to fetal sex or sex chromosomes. Gender identity cannot be determined before birth by a chart, scan, or blood test.