Does older culture media reduce the chance of IVF success?

According to this Genea led study of almost 10,000 IVF cycles, no. The age of culture media within its approved shelf life made no measurable difference to embryo development, pregnancy rates, live birth rates or baby birthweight.

How is culture media given a shelf life?

Culture media is manufactured under strict quality controlled conditions and assigned a shelf life to guarantee consistency and safety. This research confirms that performance remains consistent for the full length of that approved shelf life.

How many clinics and cycles were included in the study?

The study analysed data from almost 10,000 individual IVF cycles across eight Australian fertility clinics, making it one of the larger studies of its kind published on this topic.

Where was this research published?

The findings were published in Human Reproduction, an internationally respected, peer reviewed journal in the field of reproductive science.

Does this research affect how my own IVF treatment is managed?

No changes are needed to your individual treatment. This research confirms that existing laboratory practices, using culture media within its approved shelf life, are safe and effective, supporting continued high quality care.

How does this research support sustainability in IVF laboratories?

By confirming that culture media performs consistently across its full shelf life, laboratories can use existing stock with confidence rather than discarding it earlier than necessary, reducing waste without compromising patient outcomes.

Can I ask my fertility team more about how my embryos are cared for in the laboratory?

Yes. Our embryology and care teams are always happy to explain what happens to your embryos at every stage, in plain language. Speak with your care team or our Fertility Concierge for more information.

Is this study relevant to all IVF patients, or only certain groups?

The study drew on cycles across eight different clinics and a broad range of patients, giving the findings wide relevance. Your individual fertility specialist can discuss how the science behind your specific treatment plan applies to you.

How does IVF culture media age affect success rates

Q: What is IVF culture media?

Culture media is a specially formulated liquid that embryos develop in during their first few days outside the body, before being transferred to the uterus or frozen. It provides the nutrients and conditions embryos need to grow, similar to the natural environment of the fallopian tube and uterus.

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Key takeaways IVF culture media research FAQs References

Key takeaways

A new Genea led study of almost 10,000 IVF cycles across eight Australian clinics found that the age of embryo culture media, within its shelf life, made no difference to outcomes.
There was no measurable impact on embryo development, pregnancy rates, live birth rates or baby birthweight, regardless of how close the media was to its expiry date.
The findings, published in the international journal Human Reproduction, support the safe use of culture media for its entire approved shelf life.
This research helps reduce unnecessary waste in IVF laboratories, supporting more sustainable fertility care without compromising safety or outcomes.
The study reflects Genea's ongoing commitment to research that directly improves laboratory practice for patients across Australia.

What is IVF culture media, and why does it matter?

When an egg is fertilised in the laboratory during IVF (in vitro fertilisation), the resulting embryo does not grow inside the body straight away. Instead, it develops for several days in a carefully formulated liquid called culture media, sometimes described as the embryo's temporary home outside the body.

Culture media is designed to mimic the natural environment of the fallopian tube and uterus, supplying the nutrients, proteins and other components an embryo needs in its earliest days of life. Every batch of media is manufactured to strict quality standards and given a shelf life, much like any other laboratory or medical product.

For years, there has been debate within the fertility science community about whether culture media performs consistently across its entire shelf life, or whether embryos cultured in "older" media (media closer to its expiry date, but still within date) might have different outcomes compared to embryos cultured in freshly manufactured media. It is a question that matters because it touches on both the safety of treatment and the efficiency of the laboratories that support it.

The question our researchers set out to answer

A 2026 study by Morbeck, Hesketh and Bui, published in Human Reproduction, set out to settle this question with real world, large scale evidence rather than assumption. The resulting study, "Does the age of IVF culture media affect your chances of success?", was published in 2026 in Human Reproduction, one of the most respected peer reviewed journals in reproductive science.

Rather than a small laboratory trial, the research drew on data from almost 10,000 individual IVF cycles carried out across eight Australian fertility clinics. This scale gives the findings real statistical weight, and reflects outcomes across a genuinely diverse group of patients, treatment protocols and laboratory settings, not just a single clinic or a narrow patient group.

The researchers specifically looked at whether the age of the culture media used, measured against its full approved shelf life, had any relationship with four key outcomes that matter most to anyone undergoing treatment:

Embryo development in the laboratory
Pregnancy rates
Live birth rates
Baby birthweight

FAQs

About the authors

Dr. Dean Morbeck

Genea Chief Scientific Officer

Dr. Dean Morbeck, PhD, HCLD, is Chief Scientific Officer for Genea Fertility and adjunct Associate Professor at Monash University.

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Diana Bui

Diana Bui - Genea Director of Clinical Embryology

Diana Bui, Director of Clinical Embryology at Genea, has been part of the Genea Embryology team for over 13 years and an Embryologist for over 21 years.