A couple sits across from their doctor after a second failed transfer, and the word that keeps surfacing is chance. Bad luck, wrong timing, one of those things. Sometimes that’s accurate. Often it isn’t, and the actual variable sitting underneath the outcome is which screening technology looked at the embryo before it was ever transferred. The ngs testing bangkok clinics now offer wasn’t standard a decade ago, and the gap between it and older methods is bigger than most patients realize going in.
Older genetic screening wasn’t wrong, exactly. It was limited. And limited screening on an embryo with a subtle problem can produce a result that looks clean when it isn’t.
What Older Screening Actually Missed
Earlier chromosome screening methods typically checked a smaller set of chromosomes rather than all of them, which meant a genuine issue outside that set could slip through undetected. The technology wasn’t built to catch it. It wasn’t designed to.
Newer sequencing changes that by analyzing all 24 chromosome types in a single pass, picking up not just whether a chromosome count is wrong but smaller structural issues too, deletions and duplications that older methods weren’t sensitive enough to flag. That distinction between counting chromosomes and actually reading their structure is where the real gap in old screening lived.
The Practical Difference For A Failed Cycle
Here’s where it gets concrete. A couple who transferred what looked like a chromosomally normal embryo, and still lost the pregnancy, sometimes finds out later that the original test simply couldn’t see the specific abnormality involved. Not because anyone made a mistake. Because the tool had a blind spot.
| Older Screening Methods | Modern NGS Screening | |
|---|---|---|
| Chromosomes analyzed | Limited subset | All 24 types |
| Detects structural issues (deletions, duplications) | Rarely | Yes |
| Accuracy on subtle abnormalities | Lower | Around 99.9%+ |
| Turnaround for results | Slower | Typically a few days |
| Data resolution per chromosome set | Lower | Over one million data points |
None of this guarantees a pregnancy. No screening technology does that, and any clinic promising otherwise isn’t being straight with you. What it does is close the specific blind spot that sometimes explains why a “normal” embryo still failed.
What The Process Actually Involves
The mechanics are fairly standard across clinics like ngs testing bangkok offering this level of screening. A small number of cells are taken from the embryo, usually at the blastocyst stage. That DNA is amplified thousands of times over so there’s enough material to sequence. The sequencing itself picks up numerical and structural abnormalities. Then, and only then, does an embryologist recommend which embryo or embryos look strongest for transfer.
Cost varies by clinic and by case, shaped mostly by how many embryos need testing and whether any additional genetic services are added on. Patients are usually better served asking for a written breakdown up front than trying to estimate it from general pricing pages.
What To Actually Ask Before The Next Cycle
Recurrent loss or a failed transfer doesn’t automatically point to the embryo. Better screening wouldn’t necessarily have changed the outcome either. That said, couples with more than one unsuccessful cycle behind them have a reasonable case for raising it directly with a specialist.
