09/24/2026
Did you know that fertility clinics may have different requirements when accepting adopted embryos?
Several factors can influence whether a clinic is able to accept embryos for transfer, including:
• Developmental stage: Some clinics prefer embryos frozen at the blastocyst stage, while others may also accept embryos frozen at earlier stages.
• Freezing method: Many clinics prefer or require embryos preserved through vitrification, while some are also equipped to work with embryos preserved using the older slow-freeze method.
• Embryo grade: Clinics may consider embryo grading, though grading can vary between clinics and embryos may be reviewed on a case-by-case basis.
• Age of the egg source: Clinics may consider the age of the egg source at the time of fertilization.
• When the embryos were created: Some clinics have preferences related to when embryos were frozen, often because of the freezing method and storage devices used at the time.
• Freezing and storage devices: A clinic’s ability to accept embryos may depend on whether its equipment, thawing protocols, and staff can work with the specific device in which the embryos are stored.
• Donor-created embryos: Most clinics are open to embryos created using donor eggs, donor s***m, or both, and may even prefer them in certain circumstances.
Ultimately, each fertility clinic has the final authority to determine whether it will accept a particular set of embryos. Understanding a clinic’s requirements, preferences, and restrictions early in the process can help families make informed decisions and avoid unnecessary delays.
Visit www.embryoadoption.org to learn more.
