International embryo transfer

1.1 What is embryo transfer?

Embryo Transport refers to the professional process of transferring frozen embryos from a laboratory in a medical institution to another location in a strictly controlled environment. This operation is a key link in the field of assisted reproductive technology (ART), especially in cross-border medical services. Its operational standards far exceed those of ordinary logistics and must be carried out by qualified biological transportation companies to ensure the safety and biological activity of embryos throughout the entire process.

1.2 Main driving factors for embryo transfer

Expectant parents typically choose embryo transfer based on the following core needs:

(1) Avoiding legal restrictions: When the country or region where prospective parents are located prohibits or strictly restricts assisted reproductive technologies such as surrogacy, they must transfer the embryo to a country with a more relaxed legal environment (such as Kyrgyzstan, the United States, etc.) to achieve family planning.

(2) Seeking high-quality medical resources: Expectant parents may wish to utilize more advanced medical technology, authoritative experts, or higher success rates in the target country, and therefore choose to transfer embryos to designated high-level clinics.

(3) Continuation of Family and Fertility Planning: Due to changes in work or life, families may need to transfer previously stored embryos to a new place of residence in order to more conveniently continue their fertility plans in the future.

1.3 Technical cornerstone: Embryo cryopreservation technology

The feasibility of embryo transfer is based on mature embryo cryopreservation technology. Through advanced methods such as vitrification freezing, embryos can enter a dormant state and be stored for a long time in liquid nitrogen at -196 ℃. The reliability of this technology has been widely verified, for example, embryos frozen for more than 20 years can still successfully conceive healthy babies after thawing, which fully demonstrates the long-term maintenance ability of cryopreservation for embryo quality. We have successfully operated embryo transfer from countries such as Cambodia, Malaysia, and Japan to the United States or Kyrgyzstan, accumulating rich practical experience.

Embryo transfer is a systematic engineering that requires precise collaboration among multiple parties (transferring clinic, receiving clinic, transportation company, prospective parents). The following are the standardized operating steps:

Stage 1: Pre coordination and document preparation

Release review for transferring clinics:

Confirm the detailed information of the embryo, including the freezing method (vitrification or slow freezing) and storage records.

Verify that the prospective parents have signed all necessary authorization documents to authorize the clinic to release the embryos.

Ensure that the transfer of embryos complies with local regulations on the transfer of biological materials.

Admission assessment for receiving clinics:

Review the quality report of embryos, developmental stage records (such as whether they are blastocysts), and laboratory operating procedures.

Confirm whether the embryo has undergone pre implantation genetic screening (PGS) and evaluate its results.

Ensure that the freezing and storage technology of the transferring party is compatible with the equipment and thawing protocol of the receiving laboratory.

Integration of patient data:

Expectant parents are required to provide a complete set of medical records, including embryo freezing reports, developmental records, PGS screening reports (if available), and a transfer authorization letter jointly signed by both clinics.

Phase 2: Development of transportation plan and legal compliance

Entrusting a professional transportation company:

Provide the transportation company with accurate addresses and contact information for transferring and receiving clinics.

Clearly inform key information such as the number of embryos and freezing method to select appropriate transportation equipment (such as dry liquid nitrogen tanks).

Collaborate with transportation companies to develop a detailed transportation plan that includes schedules, transportation routes, and real-time monitoring solutions.

Get shipping quote:

The transportation company will provide a detailed quotation based on factors such as the number of embryos, transportation distance (cross-border transportation costs are significantly higher), insurance requirements, and whether special customs clearance services are needed.

Ensure cross-border legal compliance:

The transportation company is responsible for researching and complying with the laws and regulations of the destination country regarding the entry of biological materials.

Prepare and submit all necessary customs documents, transportation permits, and quarantine certificates to ensure a smooth customs clearance process.

Phase Three: Transportation Execution and Full Process Monitoring

Application of professional transportation equipment:

We use professional dry liquid nitrogen tanks (Dry Shipper) certified by the International Air Transport Association (IATA). It is composed of highly adsorbent materials inside, which can safely lock liquid nitrogen and maintain an ultra-low temperature environment of -150 ° C to -190 ° C without causing liquid shaking.

This device has a super long insulation time of 7 to 14 days, which is sufficient to cope with long-distance transportation and potential delays.

Real time temperature and logistics monitoring:

The entire transportation process is monitored in real-time through the built-in temperature recorder and GPS tracking system.

The monitoring content includes temperature changes inside the tank, arrival status of various logistics nodes, and emergency plans (such as backup equipment scheduling) to respond to unexpected situations.

Stage 4: Embryo reception and validation

Standardized acceptance of receiving clinics:

After the embryo arrives, laboratory experts first check the temperature records of the transportation equipment to confirm that the temperature throughout the process meets the standard.

Open the box and check the integrity of the embryo storage device to ensure that it has not been affected by any physical factors.

Safely transfer the embryos to the liquid nitrogen storage tank in the recipient's laboratory and complete the information registration.

Final confirmation of medical plan:

After the acceptance is completed, the doctor will develop or fine tune subsequent medical plans based on the final state of the embryo and the treatment plan of the intended parents, such as determining the best timing for embryo transfer.

Stage 5: File Archiving and Follow up Support

Document organization and archiving:

After transportation is completed, expectant parents should collect and properly store all relevant documents, including the final report from the transportation company (including temperature monitoring data), the handover confirmation letter from the clinic, etc.

Emergency response mechanism:

If any potential issues are discovered after transportation, the transportation company and clinic will initiate emergency support, collaborate to investigate the problem, provide solutions, or provide additional medical consultation.

The biggest concern for expectant parents who possess precious embryos, especially older self fertilized embryos, is whether the transportation process will damage the quality of the embryos.

From a technical and procedural perspective, professional international embryo transportation is highly safe. The core guarantee lies in:

Stable ultra-low temperature environment: Embryos are in a metabolic quiescent state in liquid nitrogen at -196 ° C. The dry liquid nitrogen tank used for transportation can simulate this environment and maintain a constant temperature between -150 ° C and -190 ° C, effectively preventing damage to embryos caused by temperature fluctuations. Research has shown that maintaining stable low temperatures is key to ensuring clinical pregnancy rates after embryo thawing.

Certified professional equipment and institutions: We only cooperate with professional companies that hold international embryo transport certification and use Dry Shipper transport tanks that comply with IATA standards. These companies have rich experience in handling biomaterials and mature operating standards.

Distance is not a barrier: whether it is domestic transportation between the east and west coasts of the United States, or cross continental transportation from Asia, Europe to Kyrgyzstan, as long as the process is professional and the equipment meets the standards, the transportation distance itself will not pose a threat to the quality of embryos.

Therefore, as long as a qualified and experienced professional team is selected, expectant parents do not need to overly worry about the negative impact of transportation on embryo quality.

Not all clinics are willing to accept foreign embryos, mainly due to considerations of treatment success rate and responsibility attribution. For example, in the United States, the success rate of clinics is regulated by agencies such as the FDA, so there are strict evaluation criteria for the embryos received.

In order to ensure the smooth reception and subsequent treatment of transferred embryos, the receiving clinic usually pays attention to the following points:

Embryo quality and developmental information:

Quality assessment: The original laboratory is required to provide a detailed embryo morphology rating report.

Developmental stage: Identifying which day (Day 5/Day 6 blastocyst) the embryo is in is an important indicator for evaluating its implantation potential.

Genetic screening (PGS) status:

Have you undergone PGS screening and its results. Embryos that have undergone PGS screening and have normal chromosomes have a higher success rate of transplantation and are more favored by the receiving doctor. If screening is not conducted, the recipient may suggest conducting relevant tests before transplantation.

Technical docking between laboratories:

There may be differences in the formulation, operating procedures, and equipment of the freezing liquid among different laboratories. Therefore, the laboratories of the transferring and receiving parties must have detailed communication to ensure that the thawing plan can be perfectly matched and maximize the embryo recovery rate.

Complete medical records:

Expectant parents must provide comprehensive medical records, including detailed reports on ovulation induction plans, egg retrieval records, fertilization methods, and embryo culture processes. This helps the receiving doctor to have a comprehensive understanding of the embryo's "history" and thus develop the optimal transplantation plan.

The transfer process can only be officially initiated after the receiving doctor and laboratory have fully evaluated and agreed in writing to receive the embryos.

The cost of embryo transfer varies due to various factors, including:

Short distance transportation: For example, from Russia to Kyrgyzstan, if the cost can be shared with other customers, the cost may be around $2000.

Medium range transportation: The cost is usually between 3000 and 5000 US dollars.

Long distance cross continental transportation: such as transferring from Europe or the United States to Kyrgyzstan, the cost may exceed $7000.

The cost of embryo transfer varies due to various factors, including:

Short distance transportation: For example, from Russia to Kyrgyzstan, if the cost can be shared with other customers, the cost may be around $2000.

Medium range transportation: The cost is usually between 3000 and 5000 US dollars.

Long distance cross continental transportation: such as transferring from Europe or the United States to Kyrgyzstan, the cost may exceed $7000.

Stage 1: Embryo reception and secure storage

Embryo verification and storage: After the embryos arrive at the cooperative clinic in Kyrgyzstan, they will undergo final acceptance by laboratory experts. After verifying the information is correct, they will be safely stored in the clinic's liquid nitrogen tank and wait for the start of the transplantation cycle.

Stage 2: Screening and Preparation of Surrogacy Mothers

Strict screening: Surrogacy agencies will screen surrogate mothers based on the following criteria:

Age between 21 and 35 years old.

Physically healthy, with no history of genetics, infectious diseases, or adverse pregnancy and childbirth conditions.

Have a healthy reproductive history of at least one full-term delivery.

Comprehensive evaluation: The selected candidates need to undergo a comprehensive physiological and psychological evaluation, including reproductive system examination, endocrine level testing, infectious disease screening, and mental health assessment, to ensure that their physical and mental states are suitable for surrogacy.

Endometrial preparation: During the transplantation cycle, surrogate mothers will regulate the thickness and receptivity of the endometrium by using drugs such as estrogen and progesterone to achieve the most suitable state for embryo implantation.

Stage 3: Embryo Thawing and Transplantation

Embryo thawing: Prior to transplantation, the embryo is thawed and thawed by an experienced embryologist in an ultra clean laboratory, and its viability is evaluated.

Transplantation surgery: The thawed embryo is precisely transplanted into the surrogate mother's uterine cavity through a soft catheter guided by ultrasound. This process is short in time and usually painless.

Confirmation of pregnancy after transplantation: After transplantation, the surrogate mother needs to rest and take medication according to medical advice. After about 10-14 days, HCG levels will be tested by blood sampling to confirm pregnancy.

Stage 4: Management and Support during Pregnancy

Regular prenatal check ups: After confirming pregnancy, surrogate mothers will undergo systematic prenatal check ups, including regular ultrasound examinations to monitor fetal development, and blood and urine tests to assess maternal health.

Nutrition and Health Management: Surrogacy agencies will provide professional nutrition guidance and health management for surrogate mothers to ensure that the fetus receives adequate nutrition.

Legal and psychological support: Throughout the pregnancy, expectant parents and surrogate mothers will receive continuous legal counseling and psychological support to safeguard their rights and ensure smooth cooperation

Stage 5: Delivery and Legal Handover

Delivery plan: As the due date approaches, the medical team will develop a detailed delivery plan and choose the safest delivery method (vaginal or cesarean section) based on the situation.

Newborn Health Check: After birth, babies will immediately undergo a comprehensive newborn health check.

Legal document processing: According to Kyrgyz law, prospective parents will be registered as the legal parents of the baby and reflected on the birth certificate. Subsequently, the surrogacy agency will assist in obtaining the baby's passport and other travel documents for a smooth return to their home country.