Doctor, I heard that third-generation IVF is advanced. Does that mean the higher the generation, the higher the success rate?

This is often the first question many patients ask during consultations.

In reality, third-generation IVF (PGT) isn't an “advanced version” of IVF, but rather a precision tool tailored for specific groups.

I. Why is PGT perceived as advanced?

Social media and advertising often categorize IVF technologies as first-, second-, and third-generation:

First-generation: Conventional IVF

Second-generation: ICSI (Intracytoplasmic Sperm Injection)

Third-generation: PGT (Preimplantation Genetic Testing)

Many mistakenly believe that higher numbers indicate more advanced technology and higher success rates.

This is not entirely accurate.

The core of third-generation IVF involves chromosomal or genetic testing of embryos to select healthy ones.

It addresses not “poor egg quality” but “embryo chromosomal abnormalities.”

II. Technical Differences

First-Generation IVF     Egg fertilization and embryo culture

Second-Generation ICSI     Low sperm motility or morphological abnormalities

Third-Generation PGT     Embryo chromosomal abnormalities and genetic disease screening

Conclusion: Third-generation IVF is not “advanced,” but a tool precisely matched to suitable candidates.

III. Real Case Analysis

Case 1: Advanced Maternal Age, Suitable for Third Generation

Ms. Wang, 39 years old, experienced two recurrent miscarriages.

Examination revealed a high rate of chromosomal abnormalities in embryos (60%).

Doctor recommended third-generation IVF with PGT

12 eggs retrieved, resulting in 6 viable embryos for transfer

Ultimately, 1 healthy embryo successfully implanted, leading to a successful pregnancy

Had first- or second-generation IVF been used, the miscarriage risk would remain high, potentially requiring multiple transfers for success.

Case 2: Young Female, Third-Generation Not Necessary

Ms. Zhang, 32, with normal ovulation and no history of miscarriage.

Doctor recommended conventional second-generation ICSI.

10 eggs retrieved, yielding 8 embryos.

Successfully conceived after embryo transfer.

Unnecessary use of third-generation IVF would only increase financial burden and psychological stress.

IV. Expert Perspectives

Reproductive Physician:

PGT is suitable for older women, recurrent miscarriage cases, or carriers of chromosomal abnormalities

Offers limited value for young, healthy women

Embryologist:

PGT reduces miscarriage rates caused by chromosomal abnormalities

Sampling procedures carry minimal risks, but overall safety is high

Genetic Perspective:

PGT screens for hereditary diseases but cannot guarantee complete fetal health

“Advanced technology” is merely a probability-optimizing tool, not a success guarantee

V. Key Features

Reduces proportion of chromosomally abnormal embryos

Improves single-cycle implantation success rates

Effective for advanced maternal age or recurrent miscarriage cases

VI. Critical Conclusions

There is no such thing as “advanced” third-generation IVF; it is simply a technical approach precisely tailored to specific needs.

Blind pursuit of third-generation IVF may increase financial strain and psychological burden, while success rates do not improve linearly.

Truly scientific decision-making should be based on:

Age

Medical history

Embryo chromosomal risk

Probability calculations

Do not be misled by the “advanced technology” hype. Choosing the most suitable approach for your individual circumstances is the most rational decision.

For fertility consultation in Kyrgyzstan, please contact your dedicated consultant

/Fertility Consultation /

Dr.Chan

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