How are the donor eggs frozen?

Once the eggs have been retrieved from the egg donor they are evaluated by an embryologist who selects only high-quality, mature eggs for cryopreservation. Cryos cryopreserves them through vitrification.

This method prevents ice crystal formation which could potentially damage eggs, and allows for higher survival numbers and overall success rates when using frozen donor eggs. The donor eggs are then stored in liquid nitrogen tanks, where they stay frozen and therefore, alive, for up to 15 days.

Follow the link to read about the difference between fresh and frozen donor eggs.

Articles about ordering donor eggs

• The pros and cons of using an egg donor
• Guide to choosing an egg donor
• Cost of donor eggs