[Truth] What is the success rate of test tubes? Secrets that doctors won't tell you
Source: LelaiwaPublished: 2026-04-23
This article is compiled and published by the lelaiwa team. Unauthorized reproduction is prohibited. For ongoing updates on fertility preparation, IVF, and overseas or U.S. childbirth, scan the consultant's QR code on the right to get free updates, or contact lelaiwa for free consultation anytime.
In the clinic of a reproductive center, you can often see scenes like this: two patients who were transplanted on the same day, one became pregnant successfully, but the other faced failure again. The same hospital, the same doctor, and even the same age, why are the results vastly different? In fact, the success rate of test tubes is affected by multiple factors, and subtle differences in each link may lead to different results.
1. Embryo quality: the basis for success
Embryo quality is the primary factor affecting the success rate of test tubes. High-quality embryos have better development potential and are easier to implant and develop.
Factors affecting embryo quality
- Egg qualityEgg quality declines with age, and the decline accelerates after the age of 35. In addition, ovarian reserve function, ovulation promotion plan, egg retrieval timing, etc. will all affect egg quality.
- Sperm qualitySperm vitality, shape, DNA fragment rate, etc. will all affect the quality of embryos. In particular, the sperm DNA fragment rate is too high. Even if fertilization is successful, it may lead to abnormal development of the embryo or failure of implantation.
- Fertilization and culture environmentLaboratory technology, incubator environment, culture medium quality, etc. will all affect the development of embryos.
2. Endometrial receptivity: The soil for embryo implantation
The endometrium is the "soil" for embryo implantation, and its receptivity directly affects whether the embryo can successfully implant.
Factors affecting endometrial receptivity
- Intimal thickness Theideal intimal thickness is 8-12 mm. Too thin (7mm) or too thick (14mm) will affect implantation.
-Type B is second, and type C is lower.
- Uterineblood flow with good intimal blood flow can provide sufficient nutrients and oxygen to the embryo, which is conducive to implantation.
- Endometrial lesionsEndometrial polyps, adhesions, inflammation and other lesions can affect endometrial receptivity.
3. Age: a factor that cannot be ignored
Age is an important factor affecting the success rate of test tubes, especially the age of the woman.
Effect of age on success rate
- The woman's age drops to about 40% after the age of 35, and only about 20% after the age of 40
- When the manexceeds 40 years old, the quality of sperm will gradually decline, especially the sperm DNA fragment rate will increase, which will affect the quality of the embryo.
4. Mental state: underrated factors
The impact of mental state on the success rate of test tubes is often underestimated, but in fact, negative emotions such as anxiety and stress can affect the endocrine system and then affect embryo implantation.
Influence of psychological factors
- Stress and anxietycan lead to increased cortisol levels, inhibit progesterone secretion, and affect endometrial receptivity.
- Emotional fluctuationscan affect the function of the hypothalamic-pituitary-ovarian axis, causing fluctuations in hormone levels, which is not conducive to embryonic development.
- Confidence and mentalitywhile a negative and pessimistic mentality may reduce success rates.
5. Other factors: Details determine success or failure
In addition to the above main factors, there are also some detailed factors that will also affect the success rate of test tubes.
- LifestyleBad living habits such as smoking, alcohol abuse, and staying up late can affect the quality of eggs and sperm.
- Basic diseasesBasic diseases such as diabetes, hypertension, and thyroid disease will affect the success rate of test tube.
- Drug Use ofcertain drugs may affect embryo development or implantation.
- Transplantation technologyOperating skills during transplantation, embryo placement position, etc. will affect the implantation rate.
six
Case 1:32-year-old Ms. Wang had good ovarian function and her husband's sperm quality was normal. The intima thickness was 10mm and the shape was Type A. The transplant was successful once.
Case 2:38-year-old Ms. Li had decreased ovarian function, AMH was only 0.8, her husband's sperm DNA fragment rate was 30%, the intima thickness was 7mm, and the shape was B. The transplant took three times to succeed.
Analysis: Ms. Wang is young, has good egg quality, her husband's sperm quality is normal, and the endometrial conditions are ideal. These factors together contributed to a success. However, Ms. Li is older, her ovarian function is declining, her husband has a high sperm fragment rate, and average endometrial conditions. These factors cause her to need multiple attempts to succeed.
seven
1. Optimize embryo quality:
- Wife: Maintain good living habits, eat reasonably, exercise appropriately, avoid staying up late and coming into contact with toxic and harmful substances.
- Man: Quit smoking and alcohol, avoid high temperature environments, supplement antioxidants, and improve sperm quality.
2. improve the endometrial receptivity
- Maintain a healthy weight and avoid becoming obese or wasting.
- Treat endometrial lesions such as polyps, adhesions, etc.
- Use drugs to regulate the inner membrane as prescribed by doctor, such as estrogen, aspirin, etc.
3. Adjust your mental state:
- Maintain a positive and optimistic attitude and avoid excessive anxiety and stress.
- Seek psychological support, such as communicating with family and friends, participating in test tube mutual aid groups, etc.
- Seek professional psychological counseling if necessary.
4. Choose the right treatment plan:
- Select the appropriate ovulation promotion plan according to your own situation.
- Select experienced doctors and technologically advanced laboratories.
- Follow your doctor's advice, take medication and review it on time.
8. Conclusion
The success rate of test tube is affected by a variety of factors, and there is no absolute guarantee of "one-time success." But by understanding these key factors, take appropriate measures
Remember that test tubes are a process that requires patience and persistence. Even if you encounter failure, don't be discouraged, analyze the reasons, adjust your plan, and believe that you will eventually have a good pregnancy for you. I hope that every test-tube family can realize their dream of being a parent as soon as possible!
For more on fertility preparation, second/third-generation IVF, and overseas, U.S., Thailand, Malaysia, America or Cambodia IVF, scan the QR code on the right or call lelaiwa's hotline+852 6145 8043!
In the clinic of a reproductive center, you can often see scenes like this: two patients who were transplanted on the same day, one became pregnant successfully, but the other faced failure again. The same hospital, the same doctor, and even the same age, why are the results vastly different? In fact, the success rate of test tubes is affected by multiple factors, and subtle differences in each link may lead to different results.
1. Embryo quality: the basis for success
Embryo quality is the primary factor affecting the success rate of test tubes. High-quality embryos have better development potential and are easier to implant and develop.
Factors affecting embryo quality
- Egg qualityEgg quality declines with age, and the decline accelerates after the age of 35. In addition, ovarian reserve function, ovulation promotion plan, egg retrieval timing, etc. will all affect egg quality.
- Sperm qualitySperm vitality, shape, DNA fragment rate, etc. will all affect the quality of embryos. In particular, the sperm DNA fragment rate is too high. Even if fertilization is successful, it may lead to abnormal development of the embryo or failure of implantation.
- Fertilization and culture environmentLaboratory technology, incubator environment, culture medium quality, etc. will all affect the development of embryos.
2. Endometrial receptivity: The soil for embryo implantation
The endometrium is the "soil" for embryo implantation, and its receptivity directly affects whether the embryo can successfully implant.
Factors affecting endometrial receptivity
- Intimal thickness Theideal intimal thickness is 8-12 mm. Too thin (7mm) or too thick (14mm) will affect implantation.
-Type B is second, and type C is lower.
- Uterineblood flow with good intimal blood flow can provide sufficient nutrients and oxygen to the embryo, which is conducive to implantation.
- Endometrial lesionsEndometrial polyps, adhesions, inflammation and other lesions can affect endometrial receptivity.
3. Age: a factor that cannot be ignored
Age is an important factor affecting the success rate of test tubes, especially the age of the woman.
Effect of age on success rate
- The woman's age drops to about 40% after the age of 35, and only about 20% after the age of 40
- When the manexceeds 40 years old, the quality of sperm will gradually decline, especially the sperm DNA fragment rate will increase, which will affect the quality of the embryo.
4. Mental state: underrated factors
The impact of mental state on the success rate of test tubes is often underestimated, but in fact, negative emotions such as anxiety and stress can affect the endocrine system and then affect embryo implantation.
Influence of psychological factors
- Stress and anxietycan lead to increased cortisol levels, inhibit progesterone secretion, and affect endometrial receptivity.
- Emotional fluctuationscan affect the function of the hypothalamic-pituitary-ovarian axis, causing fluctuations in hormone levels, which is not conducive to embryonic development.
- Confidence and mentalitywhile a negative and pessimistic mentality may reduce success rates.
5. Other factors: Details determine success or failure
In addition to the above main factors, there are also some detailed factors that will also affect the success rate of test tubes.
- LifestyleBad living habits such as smoking, alcohol abuse, and staying up late can affect the quality of eggs and sperm.
- Basic diseasesBasic diseases such as diabetes, hypertension, and thyroid disease will affect the success rate of test tube.
- Drug Use ofcertain drugs may affect embryo development or implantation.
- Transplantation technologyOperating skills during transplantation, embryo placement position, etc. will affect the implantation rate.
six
Case 1:32-year-old Ms. Wang had good ovarian function and her husband's sperm quality was normal. The intima thickness was 10mm and the shape was Type A. The transplant was successful once.
Case 2:38-year-old Ms. Li had decreased ovarian function, AMH was only 0.8, her husband's sperm DNA fragment rate was 30%, the intima thickness was 7mm, and the shape was B. The transplant took three times to succeed.
Analysis: Ms. Wang is young, has good egg quality, her husband's sperm quality is normal, and the endometrial conditions are ideal. These factors together contributed to a success. However, Ms. Li is older, her ovarian function is declining, her husband has a high sperm fragment rate, and average endometrial conditions. These factors cause her to need multiple attempts to succeed.
seven
1. Optimize embryo quality:
- Wife: Maintain good living habits, eat reasonably, exercise appropriately, avoid staying up late and coming into contact with toxic and harmful substances.
- Man: Quit smoking and alcohol, avoid high temperature environments, supplement antioxidants, and improve sperm quality.
2. improve the endometrial receptivity
- Maintain a healthy weight and avoid becoming obese or wasting.
- Treat endometrial lesions such as polyps, adhesions, etc.
- Use drugs to regulate the inner membrane as prescribed by doctor, such as estrogen, aspirin, etc.
3. Adjust your mental state:
- Maintain a positive and optimistic attitude and avoid excessive anxiety and stress.
- Seek psychological support, such as communicating with family and friends, participating in test tube mutual aid groups, etc.
- Seek professional psychological counseling if necessary.
4. Choose the right treatment plan:
- Select the appropriate ovulation promotion plan according to your own situation.
- Select experienced doctors and technologically advanced laboratories.
- Follow your doctor's advice, take medication and review it on time.
8. Conclusion
The success rate of test tube is affected by a variety of factors, and there is no absolute guarantee of "one-time success." But by understanding these key factors, take appropriate measures
Remember that test tubes are a process that requires patience and persistence. Even if you encounter failure, don't be discouraged, analyze the reasons, adjust your plan, and believe that you will eventually have a good pregnancy for you. I hope that every test-tube family can realize their dream of being a parent as soon as possible!
For more on fertility preparation, second/third-generation IVF, and overseas, U.S., Thailand, Malaysia, America or Cambodia IVF, scan the QR code on the right or call lelaiwa's hotline+852 6145 8043!
online consultation
ONLINE CONSULTATION
Scan the LINE QR code — free consultation