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A Y-STR (Y-Chromosome Short Tandem Repeat) test determines whether or not 2 or more males share the same paternal line. Because the Y chromosome passed almost unchanged from father to son over generations, the Y-STR test is a great way to confirm paternity indirectly when the father is not available.

All samples are processed twice in lab to ensure accurate, conclusive results. Your report will clearly indicate whether tested participants share a direct paternal relationship.

A Y-STR test is ideal for testing a child with a paternal relative such as paternal grandfather, uncle, half brother or even a male cousin in an unbroken male line.

• If a paternal relationship exists, the Y-chromosome profiles will match precisely.

• If no paternal relationship exists, the Y-chromosome profiles will be different.

Fast Free Shipping: Orders received and processed before 12:00 PM EST Monday-Friday ship the same day.  Orders received after 12:00 EST M-F or on weekends, ship the following business day.

2 Addresses: If test participants are in different cities or states, choose the option for additional shipping addresses and enter their shipping information.

Get the answers you seek. Order now with confidence.

NEW YORK NOTICE: Due to NY State Department of Health regulations, we cannot ship home testing kits to addresses within the state of New York. Please call 1-877-786-9543 for assistance.