China IVF FAQ: Examination Indicators, Process Steps & Clinical Decisions

Opening: Real consultation scenario (randomly selected)

Reproductive Clinic Scenario — Ms. Zhang, aged 35, came for consultation with a thick stack of test reports. AMH 1.2 ng/mL, FSH 11.8 IU/L, and a total of 6 antral follicles in both ovaries. She asked directly: "Doctor, what is the success rate of IVF for someone like me?" Behind this question lie the most core dimensions of IVF treatment—ovarian reserve, embryo quality, endometrial receptivity, and age-related chromosomal risks.

I. Direct Answers to Core IVF Questions

In vitro fertilization (IVF-ET) is a technique where eggs and sperm are retrieved, fertilization is completed in the laboratory, embryos are cultured, and then transferred back into the uterus. Direct clinical answers to the most common questions are as follows:

• What is the success rate? For women under 35, the live birth rate per transfer cycle is approximately 40%–50%; for ages 35–38, it drops to 30%–40%; for ages 39–42, about 15%–25%; and for those over 42, it is below 10%. Success rate depends on the embryo's chromosomal normality, uterine environment, and endocrine status.
• How long does it take? A complete cycle takes about 2–3 months, including preliminary examinations (1–2 months), ovarian stimulation (10–14 days), egg retrieval and transfer (1–2 days), and luteal phase support (12–14 days).
• Is it painful? Egg retrieval is performed under intravenous anesthesia and is painless; some people may feel mild bloating afterward. The transfer process is similar to a gynecological exam and is not noticeably painful.
• What is the cost? At a domestic public center, one cycle costs approximately 30,000–50,000 RMB, including examinations, stimulation, egg retrieval, culture, and transfer. If PGT (preimplantation genetic testing) or multiple transfers are needed, the cost increases accordingly.

II. Actual Process: From Initial Visit to Transfer

The standard IVF process is divided into six stages, each with clear medical indications and operational protocols.

1. Preliminary Examinations and Assessment

Female: AMH, FSH, LH, E2, antral follicle count, thyroid function, infectious disease screening, hysteroscopy (if indicated). Male: Semen analysis (including morphology, motility, DNA fragmentation), infectious disease screening, chromosome karyotype (if necessary).

2. Developing an Ovarian Stimulation Protocol

The doctor selects a protocol based on age, AMH, antral follicle count, BMI, and previous response. Common protocols include: antagonist protocol, long protocol, short protocol, mild stimulation protocol, and natural cycle protocol. The start time and dosage of each protocol are individualized.

3. Egg Retrieval Surgery

Under vaginal ultrasound guidance, follicles are punctured transvaginally to aspirate follicular fluid. The procedure takes about 15–20 minutes under intravenous anesthesia. After observation for 1–2 hours with no abnormalities, the patient can be discharged.

4. Embryo Culture

In vitro fertilization is completed 4–6 hours after egg retrieval. Embryos are cultured to day 3 (cleavage stage) or continued to day 5–6 (blastocyst stage). Blastocyst transfer has a higher implantation rate but also requires higher embryo quality.

5. Embryo Transfer

Under abdominal ultrasound guidance, the embryo is loaded into a transfer catheter and gently placed into the uterine cavity. Bed rest for 30 minutes after transfer is recommended. A blood test for HCG is performed 12–14 days after transfer to confirm pregnancy.

6. Luteal Phase Support

Progesterone (oral, vaginal gel, or injection) is used after transfer to maintain endometrial receptivity, continuing until 10–12 weeks of gestation, then gradually tapered based on placental function.

III. Interpretation of Key Examination Indicators

Understanding these core indicators can help you assess your fertility status and IVF success rate.

These indicators need to be interpreted comprehensively; a single abnormal value does not constitute an absolute contraindication. The doctor will make an overall assessment combining age, BMI, and obstetric history.

IV. Why Does Ovarian Reserve Decline or Sperm Quality Become Abnormal?

Core reasons for diminished ovarian reserve include: advancing age (especially accelerated follicle loss after 35), ovarian surgery (e.g., endometrioma cystectomy), chemotherapy/radiotherapy, autoimmune diseases, genetic factors (e.g., FMR1 premutation), and idiopathic premature ovarian insufficiency. Abnormal sperm quality is related to varicocele, reproductive tract infections, smoking, high temperature environments, obesity, diabetes, and genetic factors. Some causes are modifiable, while others are irreversible.

In IVF consultations, doctors focus on distinguishing "modifiable factors" from "irreversible factors." For example, vitamin D deficiency, thyroid dysfunction, and obesity (BMI>28) can be improved through intervention; whereas chromosomal translocations or Y-chromosome microdeletions require direct solutions like PGT or ICSI.

V. Doctor's Perspective: How to Develop an Individualized Plan

In the eyes of a reproductive specialist, no two couples are exactly alike. The core decision-making logic for developing a plan is as follows:

• Ovarian Response Prediction: Based on AMH, AFC, age, and previous stimulation history, patients are classified as high, normal, or low responders. For low responders (POSEIDON groups), mild stimulation or natural cycles are prioritized to avoid high-dose gonadotropins compromising egg quality.
• Sperm Source Assessment: If sperm concentration is <5×10⁶/mL or motility <10%, ICSI is planned directly; if sperm DNA fragmentation rate is >30%, treatment of the underlying cause or testicular/epididymal sperm retrieval is recommended first.
• Embryo Culture Strategy: For women under 35 with >8 eggs retrieved and no history of failed blastocyst culture, blastocyst culture plus single embryo transfer is recommended. For advanced age, low egg yield, or generally poor cleavage-stage embryo quality, day 3 transfer is considered to avoid loss during extended culture.
• PGT Indications: For women aged ≥38, recurrent implantation failure, recurrent miscarriage, chromosomal structural abnormalities, or carriers of single-gene disorders, PGT-A or PGT-M is recommended.

VI. Most Easily Overlooked Details

Based on years of clinical observation, the following items are often overlooked by patients but have a substantial impact on outcomes:

• Chromosome Karyotype Testing: About 5% of infertile couples carry balanced translocations or Robertsonian translocations, which cannot be detected by routine tests and require specific analysis. This is essential for those with recurrent miscarriage or pregnancy loss.
• Hysteroscopic Evaluation: Even if ultrasound suggests a normal endometrium, about 15%–20% of patients have small polyps, endometritis, adhesions, or hyperplasia. Hysteroscopy before transfer can significantly improve implantation rates.
• Vitamin D Levels: Vitamin D deficiency (<20 ng/mL) is associated with a displaced implantation window and decreased endometrial receptivity. It is recommended to supplement to above 30 ng/mL one month before transfer.
• Male DNA Fragmentation Rate: A normal routine semen analysis does not guarantee a normal DNA fragmentation rate. A rate >30% may affect embryo developmental potential, leading to low blastocyst formation or miscarriage.
• Document Preparation for the Protocol: Formal reproductive centers in China require both parties' ID cards, marriage certificate, and birth certificate (some centers). It is advisable to prepare these one month in advance to avoid delays due to documentation issues.

VII. Most Common Pitfalls

The following misconceptions frequently appear in outpatient clinics and directly affect treatment efficiency and costs:

• Blindly "conditioning" for over six months: For women over 38, the live birth rate decreases by about 8%–10% every six months of delay. Long-term use of traditional Chinese medicine or supplements in pursuit of an "optimal state" is not recommended, as it may miss the best treatment window.
• Excessive focus on endometrial thickness: Endometrial thickness between 7–14mm is suitable for transfer. Overly pursuing a "perfect thickness" may damage the endometrium through repeated intrauterine procedures. Endometrial pattern and blood flow are more important than thickness.
• Repeated requests for multiple embryo transfer: The obstetric risks of twin pregnancy (preterm birth, preeclampsia, gestational diabetes) are significantly higher than for singletons. The total live birth rate for single blastocyst transfer is similar to double embryo transfer, but maternal and infant safety is greatly improved.
• Neglecting weight management: For women with BMI>28, the required dose of ovulation induction drugs increases by 30%–50%, the number of eggs retrieved decreases, and the miscarriage rate increases. Losing 5%–10% of body weight can bring significant improvement.
• Self-stopping or adjusting medication: Ovulation induction and luteal phase support medications must be taken strictly on time and in the correct dosage. Missing or reducing doses can lead to poor follicular development or luteal phase insufficiency, resulting in transfer failure.

VIII. Answers to Frequently Asked Questions

Below are the 10 most frequently asked questions in the reproductive clinic, with direct clinical standard answers:

1. Can IVF select the baby's sex? Sex selection for non-medical reasons is illegal in China. PGT technology is only used for sex selection in cases of clear sex-linked genetic diseases.
2. Are IVF babies the same as naturally conceived babies? Large-scale studies show that the birth defect rate for singleton IVF babies is slightly higher than for naturally conceived babies (about 1.2% vs 0.8%), but the overall absolute risk is very low. This is mainly related to parental age and infertility factors themselves.
3. How long after a first failed IVF cycle can I start again? An interval of 1–2 menstrual cycles is recommended to allow the ovaries and endometrium to fully recover. Use this interval to analyze the cause of failure (embryo, endometrial, or protocol factors).
4. Does egg retrieval cause premature ovarian failure? No. Ovarian stimulation only "recruits" follicles that would otherwise undergo atresia in that cycle and does not deplete ovarian reserve. However, multiple retrievals (>6 cycles) may have a cumulative effect on ovarian function.
5. What preparations are needed before IVF? Both partners must complete all required tests; the woman should take folic acid (0.4–0.8 mg/day) for at least one month; quit smoking and alcohol; maintain a regular routine; no need for supplements unless specifically indicated.
6. Can I still do IVF with low AMH? Yes. Low AMH means fewer eggs may be retrieved, but as long as there are eggs, there is a chance of pregnancy. Mild stimulation or natural cycle protocols are particularly suitable for those with AMH <1.0.
7. What should advanced maternal age (≥40) focus on for IVF? The key is that the rate of embryonic chromosomal abnormalities rises exponentially with age. PGT-A is recommended to screen for transferable embryos; also pay attention to endometrial receptivity and medical comorbidities (hypertension, diabetes).
8. Does IVF require hospitalization? No. All procedures are completed on an outpatient basis. You can go home 2 hours after egg retrieval. Hospitalization is only needed for Ovarian Hyperstimulation Syndrome (OHSS) or rare complications.
9. How can Ovarian Hyperstimulation Syndrome (OHSS) be prevented? Doctors reduce risk by adjusting the hCG trigger dose, using a GnRH agonist trigger, or freezing all embryos. Patients should watch for symptoms like bloating, reduced urination, and difficulty breathing, and seek medical attention promptly.
10. How soon after IVF transfer can I test for pregnancy? A blood test for HCG 12–14 days after transfer is the most accurate. Using early pregnancy tests too soon may give false negatives or positives, increasing anxiety.

When to do IVF tests How long to prepare in advance Passport validity requirements What materials are needed for filing Male examination items Female examination items Can I do IVF with low AMH What to prepare for advanced maternal age IVF How to prepare IVF documents Do I need to condition before IVF Ovulation induction Egg retrieval Embryo culture PGT Frozen embryo Transfer Luteal phase support Reproductive doctor Laboratory

— Clinical Physician, Reproductive Medicine Center