How to have twins through IVF in the U.S. and Mexico? Avoid common pitfalls in IVF planning

2026-04-11 12:14:48，visits： 120

 

In today’s fast-paced world, many couples enter the fertility journey with the hope of “having two babies at once,” aiming to build a complete family more quickly through assisted reproductive technology. However, once they begin an IVF cycle in the U.S. or Mexico, they often realize that having twins is not as simple as “transferring one more embryo,” and may instead introduce additional risks and uncertainties.

 

Two types of twins

 

Human twins are divided into identical twins and fraternal twins. Identical twins originate from a single fertilized egg that splits, resulting in identical genetic material. Fraternal twins develop from two separate eggs fertilized by different sperm, with genetic similarity comparable to regular siblings. In natural conception, the occurrence rate of identical twins is very low, approximately 0.3%–0.4%.

 

Traditional multiple embryo transfer was once considered a common method to improve success rates. However, modern IVF centers in the U.S. and Mexico have largely shifted toward single embryo transfer. IVF-PGT uses genetic screening (PGT) to comprehensively eliminate chromosomal abnormalities and genetic risks before transfer, significantly improving implantation rates and overall health outcomes with a single high-quality embryo. Even with the transfer of just one embryo, overall success rates are often higher than in past multiple embryo transfer approaches, while significantly reducing the risks associated with twins, such as preterm birth, low birth weight, and pregnancy-induced hypertension.

 

How egg freezing in the U.S. and Mexico supports flexible planning for twins

 

If there are concerns about ovarian reserve or egg quality, egg freezing technology in the U.S. and Mexico allows high-quality eggs to be preserved at a younger age. Vitrification enables post-thaw survival rates of over 90%, with outcomes close to those of fresh eggs. This provides sufficient “backup” for future IVF cycles. Intended parents can freeze multiple embryos during the first cycle and later decide between single embryo transfer or spaced pregnancies, avoiding the physical burden associated with pursuing twins in a single attempt.

 

How the entire process aligns with intended parents’ schedules

 

The IVF system in the U.S. and Mexico emphasizes efficiency and personalization. From online evaluation to short-term travel for egg retrieval and subsequent frozen embryo transfer, the entire process is designed around the couple’s schedule, minimizing repeated travel. Single embryo transfer combined with IVF-PGT allows intended parents to achieve optimal outcomes with lower risk. If twins are desired, physicians will provide professional recommendations based on uterine conditions and embryo quality, rather than simply encouraging multiple embryo transfers.

Dr. Nathan Zhang founded the IVF USA team, which has been engaged in overseas assisted reproductive consulting services for more than ten years, providing services such as egg freezing in the United States, IVF, and third-party assisted reproduction for those in need. With nearly 20 years of experience in the overseas assisted reproduction field, IVF USA has, based on diversified and personalized reproductive needs, established an early presence in the Mexican market and become the Chinese agency for Power Fertility Center Mexico POWER Fertility Center (POWER IVF). Currently, Dr. Nathan Zhang’s services have expanded beyond the United States to include IVF and egg freezing in Mexico, Japan, and Thailand, as well as regions such as Taiwan and Hong Kong, helping more people take control of their reproductive choices at different stages of life and move step by step toward the goal of a healthy and complete family.