Success Rate | Siam Fertility Clinic | กรุงเทพมหานคร

Siam Fertility Clinic Statistics

The graph below shows the proportion of frozen embryo transfers using the patient's own eggs that resulted in a pregnancy confirmed by hCG testing and a live birth during 2021–2025.

Success rates are influenced by many factors, including age, body weight, and the cause of infertility. Individual results vary depending on each patient's circumstances.

*Please note that not every treatment cycle will result in egg collection, embryo transfer, or embryo freezing (cryopreservation).

2025 Detailed Outcomes by Age Group.

The chart below presents our detailed results for 2025 only, broken down by maternal age group, from laboratory milestones through to live birth.

Fertilization rate: 84.72% (≤29), 86.67% (30–34), 82.99% (35–39) and 75.82% (>40).
Blastocyst rate: 69.49% (≤29), 61.17% (30–34), 59.80% (35–39) and 38.71% (>40).
Clinical pregnancy rate per frozen embryo transfer (FET): 33.33% (≤29), 50.00% (30–34), 56.52% (35–39) and 9.09% (>40).
Miscarriage rate per FET: 0.00% in all age groups.
Multiple pregnancy rate per FET: 33.33% (≤29), 8.33% (30–34), 4.35% (35–39) and 0.00% (>40).
Live-birth rate per clinical pregnancy: 100.00% in all age groups.

Data for 2025: 98.78% of patients underwent ICSI (intracytoplasmic sperm injection), and 76.83% underwent preimplantation genetic testing by next-generation sequencing (NGS). FET = frozen embryo transfer

2024 Detailed Outcomes by Age Group.

The chart below presents our detailed results for 2024 only, broken down by maternal age group, from laboratory milestones through to live birth.

Fertilization rate: 100.00% (≤29), 86.67% (30–34), 88.36% (35–39) and 73.33% (>40).
Blastocyst rate: 88.89% (≤29), 47.69% (30–34), 71.21% (35–39) and 70.37% (>40).
Clinical pregnancy rate per frozen embryo transfer (FET): 33.33% (30–34), 52.27% (35–39) and 55.56% (>40).
Miscarriage and multiple pregnancy rates: Low. A miscarriage rate of 6.82% and a multiple pregnancy rate of 2.27% appeared only in the 35–39 group. All other groups recorded 0.00%.
Live-birth rate per clinical pregnancy: 100.00% (30–34), 86.96% (35–39) and 100.00% (>40).

Data for 2024: 96.26% of patients underwent ICSI (intracytoplasmic sperm injection), and 71.96% underwent preimplantation genetic screening (PGS). FET = frozen embryo transfer.

2023 Detailed Outcomes by Age Group

The chart below presents our detailed results for 2023 only, broken down by maternal age group, from laboratory milestones through to live birth.

Fertilization rate: 88.67% (35–39) and 84.42% (>40).
Blastocyst rate: 69.37% (35–39) and 64.06% (>40).
Pregnancy rate per frozen embryo transfer (FET): 50.00% (30–34), 68.63% (35–39) and 39.13% (>40).
Miscarriage rate per FET: 0.00% (30–34), 7.84% (35–39) and 4.35% (>40).
Multiple pregnancy rate per FET: 0.00% (30–34), 5.88% (35–39) and 4.35% (>40).
Live-birth rate per clinical pregnancy: 100.00% (30–34), 88.57% (35–39) and 88.89% (>40).

2022 Detailed Outcomes by Age Group

The chart below presents our detailed results for 2022 only, broken down by maternal age group, from laboratory milestones through to live birth.

Fertilization rate: 88.67% (35–39) and 84.42% (>40).
Blastocyst rate: 69.37% (35–39) and 64.06% (>40).
Pregnancy rate per frozen embryo transfer (FET): 50.00% (30–34), 68.63% (35–39) and 39.13% (>40).
Miscarriage rate per FET: 0.00% (30–34), 7.84% (35–39) and 4.35% (>40).
Multiple pregnancy rate per FET: 0.00% (30–34), 5.88% (35–39) and 4.35% (>40).
Live-birth rate per clinical pregnancy: 100.00% (30–34), 88.57% (35–39) and 88.89% (>40).

Data for 2022: 100% of patients underwent ICSI (intracytoplasmic sperm injection), and 82.20% underwent genetic testing (PGS: Preimplantation Genetic Screening). FET = frozen embryo transfer.

2021 Detailed Outcomes by Age Group

The chart below presents our detailed results for 2021 only, broken down by maternal age group, from laboratory milestones through to live birth.

Fertilization rate: 80.65% (35–39) and 75.82% (>40).
Blastocyst rate: 60.98% (35–39) and 48.48% (>40).
Pregnancy rate per frozen embryo transfer (FET): 38.89% (35–39) and 37.50% (>40).
Miscarriage rate per FET: 2.78% (35–39) and 0.00% (>40).
Multiple pregnancy rate per FET: 0.00% in both age groups.
Live-birth rate per clinical pregnancy: 92.86% (35–39) and 100.00% (>40).

Data for 2021: 100% of patients underwent ICSI (intracytoplasmic sperm injection), and 82.61% underwent genetic testing (PGS: Preimplantation Genetic Screening).