What can I expect from the egg freezing process?

Egg Freezing Process

It’s a fact that New Zealanders are starting to have children later in their lives than in previous years. What hasn’t changed however, is that your fertility declines as you age. While social reasons aren’t the only possible cause for pursuing egg freezing, they are becoming more common motivators.

Back in 2014, both Apple and Facebook brought egg freezing to the forefront when they announced they would pay for their female employees who chose to undergo the procedure, as a strategy to attract more women workers.

For any person who has felt the dilemma between making the most of prime working and living years while also desiring a family, it is likely that egg freezing has crossed their mind.

But what exactly can you expect from the egg freezing process and what does it entail?


The egg freezing procedure

The first step in the egg freezing process is to undergo hormonal ovarian stimulation to increase the number of eggs that can be harvested.

The hormones are usually injected daily for up to 12 days and the growth of follicles is monitored during this time with several blood tests and ultrasound scans.

Retrieval of the eggs from the ovaries is performed by the Repromed Doctor using an ultrasound probe that is inserted into the vagina.

The procedure takes about 20 minutes and is done using a light sedation so the person can return home after a couple hours of recovery.


The aim is to retrieve as many mature eggs as possible but the actual number depends on a variety of factors including age.

Of the retrieved eggs, only the mature ones are suitable for freezing and thus not all eggs retrieved will necessarily be frozen.

Mature eggs are treated with a cryo-protective solution and then frozen rapidly in a procedure called vitrification.

After freezing, eggs can be stored indefinitely.


What role does age play?

Just as increasing age makes it more challenging for women to conceive naturally, it also has an influence on the success of egg freezing.

There may be less eggs available for harvest in older women and it might also take more frozen eggs to achieve pregnancy later on. It is therefore best to freeze eggs when the person is in their 20s and early 30s.

At Repromed, we recommend having 20 eggs frozen to give the best chance of success, as we expect 75% of the eggs to survive the thawing process.

Depending on the person’s age and how well they responds to the fertility drugs, this may require one to three rounds of treatment. You can learn more about the success factors here.


Get in touch

If you want to learn more about egg freezing and whether it’s right for you, you can book in for a free 15 minute phone consultation. Get in touch today.

Megan Black

Nurse Manager


Megan leads the nursing team through the continually changing face of IVF. She works in a multidisciplinary team, providing the essential organization between the doctors and laboratory and ensuring communication between all departments.

Megan started her IVF nursing career in the United Kingdom, working in two large London clinic’s before returning to New Zealand. She is also the Secretary of Fertility Nurses of Australasia.

I love working with people and see nursing as a vocation, not a job. I usually spend my downtime absorbed in a good book and planning my next travel adventure.