When Should I Take a Paternity Test?
Published February 16, 2026 · Medically reviewed by the partner laboratory's medical director, AABB-accredited relationship-testing laboratory
There is no biological reason to delay a paternity test — DNA doesn't change. The important timing questions are legal: paternity disestablishment windows (often 2 years from awareness), birth certificate deadlines, hospital VAP opportunities, and pending court cases. If a decision is coming up, test now.
Biological timing
Any time from birth onward. Cheek swabs work on newborns, adults, and everyone in between. During pregnancy, non-invasive prenatal testing works from 7 weeks.
Ready to move forward? Order our $99 at-home test — AABB-accredited, results in 1–2 business days.
Legal timing
State disestablishment statutes often limit how long after learning of paternity fraud you can act. Some states are strict (1 year); others are lenient. If you're unsure, test now and consult an attorney about your window.
Personal timing
Whenever the question is present. Some parents test before the hospital VAP; some test years later. There is no right time — only the time that feels right to you.