The implantation of one embryo during in vitro fertilization (IVF) can sometimes lead to a multiple gestation pregnancy. This occurs through a process called embryo splitting, where a single fertilized egg divides into two separate embryos early in development, resulting in identical twins. While less common than with multiple embryo transfers, it is a possibility that patients undergoing IVF should understand.
Understanding the potential for multiple births from a single embryo transfer is crucial for informed decision-making during fertility treatment. It allows physicians and patients to discuss the risks and benefits associated with twin pregnancies, such as premature birth and low birth weight, as well as the increased maternal health risks. The incidence of monozygotic twinning, while relatively stable historically, can be slightly elevated in pregnancies conceived through assisted reproductive technologies. This information enables individuals to consider their personal circumstances and make choices aligned with their desired family size and health considerations.
