Failed to conceive for years? Is IVF in China right for you? Conditions, process & risk analysis

===== Opening: A Real Consultation Scenario =====

===== A Direct Answer to the Question =====

Is IVF Suitable After Years of Failed Conception: Basic Conditions

After years of failed attempts to conceive, whether IVF in China is suitable depends on meeting the following basic conditions:

• Female age should ideally be under 45, with higher success rates for those under 40.
• Ovarian reserve function must meet basic requirements: AMH generally not lower than 0.5 ng/mL, FSH not exceeding 15 IU/L, and antral follicle count not less than 3.
• Uterine environment must be normal, with no untreated intrauterine adhesions, polyps, fibroids, or chronic endometritis.
• Male semen analysis must show viable sperm. In cases of severe oligoasthenospermia or azoospermia, microdissection testicular sperm extraction or donor sperm may be needed.
• Chromosome karyotype analysis for both partners should show no major abnormalities. If chromosomal issues exist, preimplantation genetic testing (PGT) may be necessary.
• No uncontrolled systemic diseases, such as severe hypertension, diabetes, or thyroid dysfunction.

If these conditions are generally met, a正规 fertility center in China can provide appropriate IVF treatment. However, in special cases such as severe ovarian failure, significant uterine pathology, or chromosomal abnormalities, further evaluation is needed to determine suitability and the appropriate protocol.

===== G The Most Easily Overlooked Details =====

Five Most Easily Overlooked Examination Details

Before preparing for IVF, several items are often overlooked but have a direct impact on the outcome:

• Uterine cavity assessment. Many patients focus only on hormone levels and follicle count, but endometrial polyps, minor adhesions, or chronic endometritis can affect embryo implantation. A hysteroscopy or 3D ultrasound before IVF is recommended.
• Vitamin D levels. Clinical data suggest a link between vitamin D deficiency and failed embryo implantation. This test is inexpensive but often neglected.
• Thyroid function. When TSH levels exceed 2.5 mIU/L, it is advisable to adjust to the normal range before starting an IVF cycle. Both hypothyroidism and hyperthyroidism can affect pregnancy outcomes.
• Male sperm DNA fragmentation index (DFI). A normal routine semen analysis does not guarantee normal DNA fragmentation. When DFI is above 30%, embryo development potential decreases and miscarriage risk increases.
• Coagulation function and immune-related tests. For patients with a history of repeated implantation failure or recurrent miscarriage, tests for antiphospholipid antibodies, protein S/C, etc., are recommended.

===== L Interpretation of Key Examination Indicators (Including Table) =====

Interpretation of Core Examination Indicators

Before starting the IVF process, a series of basic tests are required. The following indicators are the core basis for reproductive doctors' assessment:

===== D Differences Across Age Groups =====

Differences and Strategies Across Age Groups

Age is one of the most critical factors affecting IVF outcomes. The challenges and strategies vary significantly across different age groups:

• Under 35: Ovarian function is usually normal, and IVF success rates are relatively high. If conception has failed for years, the cause is often tubal, seminal, or unexplained. The live birth rate per single transfer is about 50–60%. Fresh or frozen embryo transfer is recommended.
• 35–38 years old: Ovarian function begins to show individual variation. Focus on assessing AMH and AFC. If indicators are normal, success rates remain good. Preimplantation genetic testing for aneuploidy (PGT-A) can be considered to reduce the risk of chromosomal abnormalities in embryos.
• 39–42 years old: Ovarian reserve declines significantly, fewer eggs are retrieved, and the rate of embryonic chromosomal abnormalities increases (approximately 40–60%). Multiple egg retrieval cycles may be needed to accumulate embryos. PGT-A is recommended to screen for normal embryos before transfer.
• Over 42: Pregnancy rates drop significantly, and miscarriage rates exceed 40%. Using one's own eggs is generally not recommended after age 45 due to extremely high chromosomal abnormality rates. If insisting on using own eggs, adequate psychological preparation and medical evaluation are essential.

===== I Actual Process =====

IVF Process at a Standard Fertility Center in China

The following is the standard procedure at most fertility centers in China, divided into eight stages:

1. Pre-treatment tests (1–2 months). Female: hormone panel (6 items), AMH, ultrasound, thyroid function, infectious disease screening, coagulation function, chromosome karyotype. Male: semen analysis, infectious disease screening, chromosome karyotype. Some centers require a hysteroscopy or endometrial biopsy.
2. File creation. After all test results are complete, the couple brings their ID cards and marriage certificate to the fertility center to create a medical file. Some centers may require a household registration booklet or birth certificate; confirm in advance.
3. Ovarian stimulation (10–14 days). Starting on day 2–3 of the menstrual cycle, injectable gonadotropins (e.g., Gonal-f, Pergoveris, LiShenBao) are administered. Ultrasound monitoring of follicle development is done every 2–3 days.
4. Egg retrieval (15–20 minutes). When follicles are mature (usually 18–22 mm), eggs are retrieved transvaginally under ultrasound guidance, typically under intravenous sedation. Patients can rest for 2–4 hours before discharge.
5. Embryo culture (3–6 days). Retrieved eggs and sperm are combined in the lab. Embryos are cultured to day 3 (cleavage stage) or day 5–6 (blastocyst stage). If PGT is performed, embryo biopsy and genetic testing take approximately 2–4 weeks.
6. Embryo transfer (5–10 minutes). Fresh embryo transfer occurs on day 3–5 after egg retrieval; frozen embryo transfer is done in a subsequent menstrual cycle. The transfer procedure requires no anesthesia and is similar to a gynecological exam.
7. Luteal phase support (until pregnancy test). After transfer, progesterone medications (oral, vaginal gel, or injection) are used to support the endometrium, maintain embryo implantation, and early development.
8. Pregnancy test (12–14 days after transfer). A blood test for hCG confirms pregnancy. If positive, luteal support continues until 8–10 weeks of gestation, then gradually tapered.

===== J Time Planning =====

Time Planning and Scheduling Suggestions

From the initial visit to completing the transfer, the overall timeline is approximately 2–3 months. Specific milestones are as follows:

• Pre-treatment testing phase: 1–2 months. Some tests have specific timing windows (e.g., hormone panel on day 2–4 of menstruation), plus waiting for results. Allow sufficient time.
• Ovarian stimulation cycle: 10–14 days. Frequent clinic visits for monitoring are required; consider taking time off or adjusting work.
• Egg retrieval and embryo culture: 3–6 days (excluding PGT time). For PGT, an additional 2–4 weeks is needed.
• Transfer and pregnancy test: Fresh embryo transfer occurs 3–5 days after retrieval; frozen embryo transfer requires waiting 1–2 menstrual cycles to prepare the endometrium adequately.

===== H Most Common Pitfalls =====

Five Most Common Pitfalls in Practice

• Adjusting medication during ovarian stimulation on your own. Some patients reduce or stop medication due to concerns about side effects, leading to poor follicle development or even cycle cancellation. Stimulation protocols must be strictly followed as prescribed; individual responses vary greatly, so do not compare dosages with others.
• Excessive activity after egg retrieval. The ovaries enlarge after retrieval; avoid vigorous exercise, sudden twisting, or heavy lifting to prevent ovarian torsion. Rest for 2–3 days is recommended.
• Strict bed rest after transfer. Prolonged bed rest is not beneficial for blood circulation and may increase the risk of thrombosis. Normal daily activities are fine after transfer; avoid heavy lifting and strenuous exercise.
• Insisting on transferring multiple embryos. Some patients insist on transferring 2–3 embryos to increase success rates, but multiple pregnancies carry higher risks (preterm birth, low birth weight, gestational hypertension). Doctors generally recommend single embryo transfer, especially for women under 35 or first-time transfers.
• Ignoring psychological state. Anxiety and depression can affect endocrine function and uterine blood flow. Studies suggest that chronic high stress may reduce embryo implantation rates. Moderate exercise, communication with your partner, or seeking psychological support is advisable.

===== Q Frequently Asked Questions =====

Frequently Asked Questions

===== B Why This Issue Arises =====

Why Evaluation for IVF is Needed After Years of Failed Conception

The reasons for years of failed conception can involve multiple factors: tubal blockage, ovulation disorders, endometriosis, male factors, immune factors, etc., all of which can make natural conception difficult. Some patients have "unexplained infertility," where routine tests show no clear abnormality, yet pregnancy does not occur over a long period.

IVF bypasses the fallopian tubes through in vitro fertilization, directly addressing the issue of sperm-egg union. Additionally, embryo transfer places the embryo directly into the uterine cavity, reducing interference from the cervix and tubes. For patients with unexplained infertility, IVF treatment itself can also serve as a diagnostic tool—by observing the fertilization process and embryo development, potential problems can be identified.

However, it must be clear: IVF is not effective for everyone. If the ovaries are severely depleted, the uterine environment is severely damaged, or there are uncorrectable chromosomal abnormalities, IVF may not solve the fundamental problem. This is why a comprehensive fertility evaluation is essential before deciding on IVF.

===== Closing: Risk Reminder =====