50-52 Gloucester Rd,
Hurstville, NSW 2220

Weekdays: 7am – 5pm
Saturday: By appointment

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What is an immature egg?

When talking to one of our embryologists, you may hear the term “immature egg” while discussing your fertilisation results. So, what is an immature egg exactly?

An immature egg is an oocyte that has not reached meiotic competency, which means it has not reached the first stages of meiotic division. For normal fertilisation to occur, the egg needs to have the correct number and arrangement of chromosomes.

When an egg is immature, it is not capable of fertilising and will not be injected or inseminated. It is normal to have approximately between 10-15% of immature eggs in one oocyte recovery, however it is possible to see more in some patients.

This is another reason why timing is so essential to your fertility treatment: the time you take your trigger injection and the time you have your egg collection or treatment. We want to maximise your chances of having a successful egg collection and excellent fertilisation rate and most of all, a successful pregnancy.

For more information on how we can help you on your fertility journey contact our clinic or visit our guide to fertility treatment options.

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Fertility First with Genea logo

50-52 Gloucester Rd,
Hurstville, NSW 2220

Fertility First was established in 1997 to offer personalised fertility health care and treatment. We provide professional advice, assessment and treatment, coupled with leading-edge assisted reproductive technologies.

A leading Sydney IVF clinic, Fertility First is located in Hurstville just 16 kilometres south of the CBD, and just a short walk from Hurstville train station, across the road from Hurstville Private Hospital.