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Detectable from 5 weeks. Results within 24 hours of lab receipt
Detectable from 5 weeks
We analyze fetal DNA in maternal blood to determine biological sex as early as 5 weeks, with over 99% accuracy.
At-home collection
A discreet blood collection kit, designed for simple use at home with guided instructions.
Fast turnaround
Free 2-day roundtrip shipping. Results delivered securely within 24 hours of lab receipt.
CLIA-certified processing
Analyzed within a CLIA-certified environment using validated molecular methods.
Scientific foundation
Developed within a platform built on decades of DNA and molecular biology research.
Only reported when results are clear
Results are only released when signal confidence meets strict thresholds.
Processed in a controlled lab environment
Every sample is handled within a CLIA-certified laboratory under controlled conditions.
Direct measurement of fetal DNA
Fetal DNA fragments are isolated and analyzed using validated molecular methods.
Multiple verification steps
Each sample passes through multiple quality checks before reporting.
Designed for early detection
At 5 weeks, fetal DNA levels are low. If detection thresholds are not met, retesting may be recommended.
Product
Detectable from 5 weeks. Results within 24 hours of lab receipt
Detectable from 5 weeks
We analyze fetal DNA in maternal blood to determine biological sex as early as 5 weeks, with over 99% accuracy.
At-home collection
A discreet blood collection kit, designed for simple use at home with guided instructions.
Fast turnaround
Free 2-day roundtrip shipping. Results delivered securely within 24 hours of lab receipt.
CLIA-certified processing
Analyzed within a CLIA-certified environment using validated molecular methods.
Scientific foundation
Developed within a platform built on decades of DNA and molecular biology research.
Only reported when results are clear
Results are only released when signal confidence meets strict thresholds.
Processed in a controlled lab environment
Every sample is handled within a CLIA-certified laboratory under controlled conditions.
Direct measurement of fetal DNA
Fetal DNA fragments are isolated and analyzed using validated molecular methods.
Multiple verification steps
Each sample passes through multiple quality checks before reporting.
Designed for early detection
At 5 weeks, fetal DNA levels are low. If detection thresholds are not met, retesting may be recommended.
A small, at-home collection using a simple device designed for comfort.
Results are based on the direct detection of fetal DNA - not prediction or estimation.
Results are delivered through a secure portal. Your data is never sold or shared.
If a clear result isn’t detected, we re-test or refund.
From receipt through analysis, established clinical standards guide each step.
Stori’s test is designed to detect these signals at their earliest measurable point - as soon as biology allows.
Everything you need for a complete at-home collection is included.
Everything you need for a complete at-home collection is included.
Designed for simple, comfortable at-home use.
For clean preparation and care.
Secure, trackable return to our laboratory.
Clear guidance for each step of the process.
How Stori outperforms other competitors.
Capability
STORI
Others
Biological sex detection from 5 weeks
Results within 24 hours of lab receipt
Expedited 2-day shipping included
Single-lab, secure processing
Three steps. One clear answer.
Your sample is analyzed in a CLIA-certified laboratory environment. Results are available within 24 hours of lab receipt and delivered through your private portal.
Your kit arrives with free 2-day round-trip shipping—discreet and ready to use. No clinic visit. No scheduling.
Use the included device to collect a small sample at home. Clear, step-by-step instructions guide the process.
Your sample is analyzed in a CLIA-certified laboratory environment. Results are available within 24 hours of lab receipt and delivered through your private portal.
Your kit arrives with free 2-day round-trip shipping—discreet and ready to use. No clinic visit. No scheduling.
Three steps. One clear answer.
STEP 1
Your kit arrives with free 2-day round-trip shipping—discreet and ready to use. No clinic visit. No scheduling.
STEP 2
Use the included device to collect a small sample at home. Clear, step-by-step instructions guide the process.
STEP 3
Your sample is analyzed in a CLIA-certified laboratory environment. Results are available within 24 hours of lab receipt and delivered through your private portal.
At just five weeks, fetal DNA circulates naturally in maternal blood - a biological signal that appears long before pregnancy may be seen or felt. Though present in extremely small amounts, these fragments carry direct information about the developing pregnancy. With appropriate molecular methods, they can be isolated, measured, and read with precision. Stori’s test is designed to work at this early biological threshold. From preparation through analysis, each step is structured to preserve signal integrity and return only what can be confidently detected.
Early in pregnancy, fragments of fetal DNA circulate in maternal plasma. Present in trace amounts and surrounded by far more maternal DNA, these signals are easy to obscure and difficult to read. Stori’s process isolates and purifies fetal DNA before analysis - a critical step, as clarity depends on what is removed as much as what remains. This allows early biological information to be measured when it first becomes detectable, not only once it becomes abundant.
Stori measures direct biological presence, not inferred outcomes. Each sample is handled individually within a controlled laboratory workflow designed to preserve signal integrity and verify results before they are released. When clarity is present, it is reported. When it is not, results are held rather than assumed. Accuracy depends on signal quality, timing, and verification, not prediction.
All testing is performed within Stori’s CLIA-certified laboratory environment. From receipt through analysis and verification, samples are processed under established clinical standards designed for molecular-level precision. Keeping testing in-house preserves continuity, accountability, and control across every stage of the process.
Biological data is not content. It is custody. Samples and results are processed within Stori’s controlled laboratory ecosystem and delivered through a secure, private portal. Information is never sold, shared, or used for research without explicit consent. Your data exists for one reason only: to return your result to you.
Early biology continues to teach us. Stori’s science evolves through ongoing refinement of methods, controls, and thresholds - improving sensitivity, consistency, and clarity while maintaining restraint. The goal is not speed for its own sake, but accuracy at the earliest moment information becomes measurable.
At just five weeks, fetal DNA circulates naturally in maternal blood - a biological signal that appears long before pregnancy may be seen or felt. Though present in extremely small amounts, these fragments carry direct information about the developing pregnancy. With appropriate molecular methods, they can be isolated, measured, and read with precision. Stori’s test is designed to work at this early biological threshold. From preparation through analysis, each step is structured to preserve signal integrity and return only what can be confidently detected.
Early in pregnancy, fragments of fetal DNA circulate in maternal plasma. Present in trace amounts and surrounded by far more maternal DNA, these signals are easy to obscure and difficult to read. Stori’s process isolates and purifies fetal DNA before analysis - a critical step, as clarity depends on what is removed as much as what remains. This allows early biological information to be measured when it first becomes detectable, not only once it becomes abundant.
Stori measures direct biological presence, not inferred outcomes. Each sample is handled individually within a controlled laboratory workflow designed to preserve signal integrity and verify results before they are released. When clarity is present, it is reported. When it is not, results are held rather than assumed. Accuracy depends on signal quality, timing, and verification, not prediction.
All testing is performed within Stori’s CLIA-certified laboratory environment. From receipt through analysis and verification, samples are processed under established clinical standards designed for molecular-level precision. Keeping testing in-house preserves continuity, accountability, and control across every stage of the process.
Biological data is not content. It is custody. Samples and results are processed within Stori’s controlled laboratory ecosystem and delivered through a secure, private portal. Information is never sold, shared, or used for research without explicit consent. Your data exists for one reason only: to return your result to you.
Early biology continues to teach us. Stori’s science evolves through ongoing refinement of methods, controls, and thresholds - improving sensitivity, consistency, and clarity while maintaining restraint. The goal is not speed for its own sake, but accuracy at the earliest moment information becomes measurable.
FREE 2-DAY SHIPPING
Free 2-day shipping is included for both delivery and return. A prepaid return label is provided with every kit.
PRIVATE AND SECURE
Biological data is not content. It is custody. Results are delivered through a secure, private portal.
RESULT GUARANTEE
If a result is inconclusive, we will re-run your sample or refund your purchase. We report only what can be confidently detected.
FREE 2-DAY SHIPPING
Free 2-day shipping is included for both delivery and return. A prepaid return label is provided with every kit.
PRIVATE AND SECURE
Biological data is not content. It is custody. Results are delivered through a secure, private portal.
RESULT GUARANTEE
If a result is inconclusive, we will re-run your sample or refund your purchase. We report only what can be confidently detected.
Below are the most common questions. Tap to expand.
How the Test Works
Stori analyzes fetal DNA in maternal blood to detect biological sex. Stori’s test measures cell-free fetal DNA (cffDNA) circulating naturally in maternal blood during early pregnancy. Using molecular biology techniques, the test isolates and amplifies fetal DNA fragments and checks specifically for Y‑chromosome–specific sequences. If these sequences are detected with sufficient clarity, the result indicates male. If they are not detected, the result indicates female. Results are based on direct biological presence—not prediction or estimation.
As early as five weeks into pregnancy. Most tests can be performed from early pregnancy onward, once sufficient fetal DNA is present in maternal blood. Stori’s test is the most sensitive prenatal gender test on the market and can reliably detect fetal gender as early as 5 gestational weeks.
A small at‑home blood sample. The Stori test requires a small blood sample collected at home using the provided collection device. The process is designed to be straightforward and does not require a clinic visit or professional appointment.
It is non‑invasive and designed for comfort. Stori’s collection method does not involve needles inserted into veins or any internal procedures. Most users experience minimal discomfort comparable to a brief skin prick.
It is purified, amplified, and reviewed under clinical standards. Once your sample arrives at the Stori laboratory, plasma is separated and fetal DNA is purified to remove background material. Controlled amplification (PCr) strengthens true biological signal, and built‑in verification steps confirm signal integrity. Results are reviewed by trained laboratory professionals before being released.
How Fetal DNA Works
Cell-free fetal DNA consists of small fragments of genetic material released from the placenta into the mother’s bloodstream during pregnancy. Since placenta originates from embryonic cells, it shares the same genetic material as the fetus.
Soon after implantation, placental cells called trophoblasts actively invade the maternal uterine lining to establish blood flow between the mother and the developing placenta. These cells grow rapidly and are continuously renewed, and small fragments of their DNA are released in the mother’s bloodstream directly through the placental interface. As a result, cell-free fetal DNA can be detected in maternal blood weeks before the fetus itself can be visualized by ultrasound.
The fetal DNA detected in maternal blood originates from the placenta, which is derived from embryonic tissue.
Accuracy & Eligibility
Stori delivers over 99% accuracy when the test is taken at or after five weeks of pregnancy and when collection instructions are followed precisely. Accuracy depends on signal quality, timing, and verification—not inference. Stori reports results only when biological signal clarity meets internal confidence thresholds.
Timing, sample quality, and contamination control. Accuracy is influenced by how early you test, how much blood is collected, sample degradation during shipping, and how carefully contamination is avoided during collection. Early pregnancy contains very low amounts of fetal DNA, which requires sensitive handling and conservative result thresholds.
Yes, but the results may only provide partial information. Stori's test can detect the presence of male DNA in multiple pregnancies, but it cannot determine the biological sex of each fetus. A male result indicates at least one male fetus (but it cannot tell whether both fetuses are male, or if one is male and the other are females). A female result indicates no detectable male DNA; in this case, results indicate that all the fetuses are female.
Fertility treatments do not affect DNA-based results. Interpretation may vary depending on the pregnancy type (e.g. multiple embryo transfer) and should be discussed with a healthcare provider.
Results Delivery
Typically within 24-48 hours of your sample arriving at our lab. Once your sample is delivered to the Stori laboratory, results are typically available within 24-48 hours. Timing may vary slightly depending on shipping conditions and verification steps, but every sample undergoes the same review process before results are released.
Through your secure Stori portal. Results are delivered through your private Stori account, where they can be viewed securely at any time. Optional email notifications are sent when results are ready, but the result itself is accessed through the Stori portal.
