Can IVF Produce Twins? Understanding Self-Carried vs. Surrogate Pregnancies, Risks, Success Rates, and Key Considerations

Many families undergoing IVF often ask: “Can we transfer two embryos at once? Can we intentionally have twins?” Some hope to complete their family planning at once, save time, or let their children grow up with a sibling. But twin pregnancies are very different from singleton pregnancies—in terms of risks, medical demands, and care requirements for the mother, baby, or surrogate. Below is a complete explanation to help you fully understand.

Self-Carrying Twins: Possible, but Much Riskier Than Expected

IVF indeed can transfer two embryos, but global reproductive medicine strongly recommends: Single Embryo Transfer (SET) is safer and offers success rates similar to double embryo transfer.

Major risks of self-carried twin pregnancies include:

• Significantly increased risk of premature birth (twins often deliver at 34–36 weeks)
   
• Higher risk of gestational diabetes and hypertension
   
• Greater chance of cesarean delivery
   
• Low birth weight or need for NICU care
   
• Much heavier physical burden on the mother and a more difficult pregnancy
   

If the mother is of advanced maternal age, has uterine issues, or a history of miscarriage or preterm birth, pursuing twins is even less recommended.

Surrogates Carrying Twins: Not Recommended in U.S. Medical Practice

Many families ask: “If the risks are high, isn’t it safer to have the surrogate carry twins instead?” But in reality, U.S. surrogacy almost never recommends transferring two embryos.

Reasons include:

• Twin pregnancies pose the same high risks for surrogates
   
• Insurance, medical responsibility, and liability become far more complex
   
• NICU expenses after preterm birth can easily reach USD 100,000–200,000
   
• Twin pregnancies increase the likelihood of legal or contractual disputes
   

For these reasons, U.S. fertility centers and surrogacy agencies generally require SET (Single Embryo Transfer). Some insurance policies even explicitly prohibit double embryo transfer.

If You Still Want Twins, These Preparations Are Essential

Despite medical recommendations, some families still hope for twins due to personal or cultural reasons.If this applies to you, the following four preparations are absolutely necessary:

1. Confirm Whether the Carrying Mother’s Health Condition Is Suitable

Including:

• Whether the uterus is suitable for twin pregnancy (fibroids, adenomyosis, septate uterus must be treated first)
   
• Whether maternal age is too high
   
• Whether BMI is within a healthy range
   
• Whether chronic conditions exist (diabetes, high blood pressure)
   

The better the body condition, the lower the risks.

2. Perform PGT-A Chromosome Testing First

To ensure both embryos are healthy.

If transferring two embryos, both must be:

• PGT-A Normal (chromosomally normal)
   
• To reduce miscarriage risk
   
• To avoid the situation where both fetuses have chromosomal abnormalities
   

Transferring two low-quality embryos is riskier and less effective than transferring one high-quality embryo.

3. Prepare for “High-Intensity Prenatal Care”

Twin pregnancies require:

• More frequent ultrasound scans
   
• Cervical length monitoring
   
• Strict monitoring of blood sugar and blood pressure
   
• Monitoring for fetal growth discordance
   
• Possible early hospitalization for tocolysis
   

Twin pregnancy is significantly more unpredictable and requires much more time, effort, and resources.

4. Reevaluate Costs, Care, and Lifestyle Arrangements

Twin pregnancies increase not only medical risks but also post-birth expenses:

• Higher chances of hospitalization and NICU fees
   
• Formula, diapers, and supplies ×2
   
• Caregiving stress ×2
   
• If using surrogacy, surrogate compensation and insurance may also increase
   

Since NICU costs can reach thousands of dollars per day, families should consult surrogacy agencies or the maternity care center regarding newborn insurance—avoiding severe financial burden from emergencies.

Success Rate Myth: Transferring Two Embryos ≠ Higher Chance of Pregnancy

Many families assume “two embryos = double the success rate.”
But modern medical studies show:

A single healthy blastocyst (SET) often has equal or higher success rates than two-embryo transfer.

Why?

• Singleton uterine environment is more stable
   
• Lower miscarriage rate
   
• Much lower risk of preterm birth
   

To increase success rates, the true key is embryo quality, maternal health, and physician strategy—not the number of embryos.

Twins Are a Beautiful Blessing—But Should Not Be Forced

Whether self-pregnancy or surrogacy, the goal is not “how many babies at once,” but ensuring every child arrives safely and healthily. Twins are adorable and full of blessings, but the medical risks, caregiving demands, and financial pressures behind them are far greater than most imagine. If you are considering double embryo transfer, it’s best to prioritize health and follow professional medical advice to make the most suitable fertility plan.