Category: Egg Freezing

Thinking about egg freezing? Learn how it works, success rates, costs, and when to start preserving your fertility. Thinking about freezing your eggs? Whether you’re planning for the future or not ready to start a family just yet, egg freezing  is a powerful fertility preservation option. In this guide, we’ll walk you through everything you need to know about how to freeze your eggs, how to freeze your eggs, and what factors to consider, including age, success rates, and costs. What Is Egg Freezing and Why Do People Do It? Egg freezing, also known as oocyte cryopreservation, is a fertility preservation technique that allows you to save your eggs for future use. It’s becoming an increasingly popular option for those who want to keep their options open when it comes to having children later in life – but does it guarantee you’ll have a baby? Let’s explore the facts. People choose egg freezing for a variety of reasons, including: Planning to have children later in life Undergoing medical treatment that could affect fertility (e.g. chemotherapy) Personal or career goals Not having found the right partner yet We explore this further in Who should consider fertility preservation?  How Does Egg Freezing Work? Step 1: Hormone Stimulation You’ll take fertility medications to stimulate your ovaries to produce multiple mature eggs in one cycle. During this time, you’ll attend regular scans and blood tests to monitor your response. Step 2: Egg Collection (Egg Retrieval) After ~10-14 days of stimulation, your eggs are collected in a short medical procedure under sedation. Once your eggs are ready, they’ll be collected via a minor surgical procedure under sedation. Most people recover within a day or two. Step 3: Freezing and Storage (Cryopreservation) Your eggs are frozen using a fast-freezing technique called vitrification, then stored safely in liquid nitrogen for potential use in the future. Can Freezing Your Eggs Guarantee a Baby? The short answer is no – freezing your eggs does not guarantee you’ll have a baby. It can increase your chances, especially if you freeze your eggs at a younger age, but several factors affect whether you’ll conceive and carry a baby successfully later in life. One major factor is your age at the time of freezing. Younger eggs tend to be healthier and more likely to result in a successful pregnancy. Freezing eggs in your twenties or early thirties typically leads to better outcomes than doing so in your late thirties or forties. Another key factor is the number of eggs you freeze. Not all eggs will survive the freezing and thawing process. Even if they do, not every egg will fertilise or become a healthy embryo. Your overall reproductive health at the time you want to use the eggs also matters. This includes the health of your uterus, your hormone levels, and any underlying fertility issues that may have developed over time. Success also depends on the quality of sperm used and the effectiveness of IVF when you’re ready to conceive. A partner’s or donor’s sperm must be healthy enough to fertilise the eggs, and the embryo must implant successfully in the uterus. When Is the Best Age to Freeze Eggs? If you’re asking, “When should I freeze my eggs?” the general recommendation from fertility experts is between you late 20s to mid 30s. During this window, egg quality and ovarian reserve are still relatively high, giving you the best chance of success later. But this isn’t a one-size-fits-all decision. Everyone’s fertility journey is different. Some people may choose to free their eggs earlier or later depending on their health, family history, a medical condition that could affect fertility, or plans to undergo treatments like chemotherapy. Others may freeze their eggs later due to career, relationship, or financial considerations.. While it’s still possible to freeze your eggs after 35, it’s important to know that success rates may decline as egg quality and reserve begin to drop with age. If you’re wondering when to start the process, the best first step is to book a fertility assessment. This typically includes hormone testing and an ultrasound to check your ovarian reserve. With this information, you can get a clearer picture of your fertility status and make an empowered decision about whether and when to freeze your eggs. You may also want to understand how ageing can affect fertility rates in women. How Many Eggs Do I Need To Freeze to Have a Baby? There’s no magic number, but we can estimate based on age and clinical data. Based on research from studies like Goldman et al. (2017) and Doyle et al. (2016), we can estimate the number of mature eggs typically needed to have about a 70% chance of achieving one full-term pregnancy. These numbers are estimates based on aiming for one baby, so if you’re hoping to grow a bigger family, freezing more eggs may be necessary to maximise your chances.   Note: These numbers aim for one full-term pregnancy. This estimation may vary depending on other factors. If the goal is more than one child, more eggs should be frozen. What Are the Egg Freezing Success Rates? If you’re thinking about freezing your eggs, one of the most important things to understand is your chance of having a baby later on. While there’s no guaranteed number of eggs that will result in a full-term pregnancy, we can give a reliable estimate based on several factors especially your age at the time of freezing. Success with frozen eggs depends on four key steps: egg survival after thawing, fertilisation, embryo development, and successful implantation. Let’s break it down. Age at the Time of Freezing Matters Most Age is the single biggest factor influencing the quality and quantity of eggs. Younger eggs tend to be healthier and have a much higher chance of leading to a successful pregnancy. How Well Do Eggs Survive Freezing and Thawing? Thanks to modern vitrification techniques, between 90–95% of mature eggs survive the thawing process. That’s a big leap from […]

In this article, we’ll delve into the world of egg freezing—but most importantly whether or not there is a perfect age to freeze your eggs. Read on to find out.  Quick facts: If you’re considering egg freezing, get in touch to see how we can help. Why egg freezing is becoming so popular According to the HFEA (Human Fertilisation & Embryo Authority), egg freezing and embryo storage cycles are the fastest-growing fertility treatments in the UK.  More people than ever are turning to egg freezing and assisted reproductive technologies (ARTs) to help them navigate their future fertility. Having children later in life is also becoming the norm. The Office of National Statistics found that more and more people are turning 30 without having had children. Between “biological clocks”, careers, relationships, medical history, genetic conditions, family expectations and more, fertility planning is tricky business.  Why fertility treatments are on the rise could be explained by a few factors. More people are looking to conceive later in life when natural conception is harder. More same-sex couples and people pursuing solo parenthood are accessing fertility treatments to conceive. And general awareness around treatments is increasing. Understanding egg freezing As you age, the quality and quantity of your eggs decline, which means getting pregnant and sometimes staying pregnant becomes more difficult. Freezing your eggs will preserve their quality as they are now, ready for when you want to have a baby.  Known medically as “oocyte cryopreservation”, egg freezing is a medical procedure that involves having your ovaries stimulated with hormones so that they produce multiple eggs. This is instead of a single egg, as in a typical natural menstrual cycle.  These unfertilised eggs are then surgically removed, frozen and stored in a fertility clinic until you’re ready to use them. The egg-freezing cycle, from ovarian stimulation to egg retrieval, takes around two weeks. You can learn more about the egg freezing process here, including a detailed breakdown of the steps.   Egg freezing can be both physically and emotionally draining. Additionally, it can cost up to £8,000 in the UK.   Egg freezing offers an opportunity to preserve your fertility if you plan on having children in the future. Maybe you want more time to focus on your career, travel the world or just haven’t found the one yet. Or perhaps you’re about to undergo medical treatments or gender-affirming therapy that could affect your fertility.  Egg freezing allows you to live this part of your life without worrying so much about your fertility. It takes the pressure of having to decide whether to have a baby now.  It’s important to note, though, that egg freezing isn’t a fail-safe method for having a baby, and its success relies on healthy eggs and a healthy reproductive environment. Generally, younger eggs are healthier eggs. If you’re considering egg freezing, at Hertility, we support you through the egg-freezing process with our partner clinics.  What is the best age to freeze your eggs? Technically, you can freeze your eggs at any age before menopause, but The earlier you do, the better your chances of having a pregnancy. Eggs retrieved in your 20s and early 30s usually result in better outcomes than those in your late 30s and 40s.  In our early to mid-twenties, we are at our most fertile, but there’s still only a 25-30% chance of us getting pregnant each cycle naturally. That number drops as the years go by—at 40, it’s only 5%.  Age also increases the risk of pregnancy-related complications like miscarriage, genetic disorders in the baby and gestational diabetes, especially after your mid-thirties. Despite the best time to freeze our eggs being under 35, the average age is 38. This potentially means that a lower quality and quantity of eggs will be retrieved, and you may need more cycles to collect enough eggs. Who is egg freezing for? There are a few instances where you may be considering egg freezing as a viable fertility preservation treatment. These are roughly split into what’s known as medical egg freezing and social egg freezing.  More obviously, medical egg freezing is when you freeze your eggs for a medical reason, for example when a medical procedure or diagnosis might increase your risk of infertility. You might choose medical egg freezing if you’re diagnosed with cancer, need cancer treatment like chemotherapy or radiotherapy, are diagnosed with an autoimmune disease or you’re having gender-affirming therapy. Genetic conditions might also influence the decision to freeze your eggs. To increase the chances of being able to have a baby in the future, women or those AFAB with a family history of early menopause or another genetic condition might consider egg freezing as a precautionary measure. The other type of egg freezing, known as elective or social egg freezing,  is more about life choices. This could include holding off on family plans because of career goals, ticking things off your bucket list or just because you’re not quite ready to have kids right now.  Your relationship status could be a deciding factor too. Maybe you haven’t found the right person, or you have but you’re both not ready for children yet. Previous difficulty with fertility might make you want to freeze your eggs as a proactive measure, or religious and cultural expectations might come into play too. Is there an egg freezing age limit? Although there’s technically no age limit for egg freezing, specific fertility clinics might impose one. This stems from the likelihood of live births reducing dramatically after 40. Fertility clinics might set age limits for various reasons, including ethical concerns. The journey of egg freezing and fertility preservation can be quite a ride, both emotionally and physically. When the odds of a successful pregnancy are slim, clinics may put age restrictions in place to safeguard the health and well-being of their patients. If you’re aged 40 or over and considering freezing your eggs, connect with a fertility advisor for personalised advice. As you age, your ovarian reserve naturally declines. An AMH (Anti-Müllerian […]

For women or those assigned female-at-birth, society ensures that as we age, we’re hyper-aware of our declining fertility. Jokes about our ticking ‘biological clocks’, extended family constantly asking when we’re going to ‘settle down’ and even trying to navigate company maternity policies—it can feel really overwhelming. There are many different pathways to parenthood and for a lot of people, either for medical or social reasons, their fertility timeline just doesn’t line up with where they are at in their personal or professional lives. Luckily, advances in reproductive science are enabling many people to access fertility treatments, like egg freezing, to preserve their fertility.  We spoke to five people, all with different circumstances, who have undergone egg freezing. We hope these accounts can help you to understand a little bit more about the egg freezing experience. Recap: What is egg freezing? The egg freezing process (known medically as ‘oocyte cryopreservation’) is a fertility preservation method and medical procedure that involves having your unfertilised eggs surgically removed from your ovaries, frozen and stored in a lab until you’re ready to use them.  You may choose to freeze your eggs if you want to have children in the future, but aren’t ready to yet. As you age, the quantity and quality of your eggs decline, which means your chance of getting pregnant does too. Freezing your eggs will preserve their quality, as they are now, for if and when you become ready to use them. There are two types of egg freezing: The egg freezing process An egg-freezing cycle involves several different stages including preliminary tests, ovarian stimulation, egg retrieval, storage and then subsequently thawing once you’re ready to use them. Egg-freezing can be incredibly empowering—allowing you to control your family planning timeline and focus on your personal and professional life, or any medical treatment, without having to worry about your fertility decline.  However, it can be an intensely emotional journey full of ups and downs, with financial strain, daily injections, and hormonal changes that can affect your mental and physical health.  Remember—if you’re going through this process, Hertility’s fertility counsellors can support you through these challenges. While the procedure is generally safe, there is a small risk of Ovarian Hyperstimulation Syndrome (OHSS), which is a condition that can happen in response to fertility medication. For more information, read our egg-freezing guide. Natalie Getreu’s egg freezing journey Ovarian biologist and one of our very own co-founders, Dr Natalie, had a unique egg freezing experience after having been both a fertility practitioner and patient.  “I thought I knew everything about egg freezing, at least from a scientific standpoint. I’d supervised procedures, sat in on consultations, educated women and delivered lectures on treatments.  But when it came to undergoing the process myself, as a patient, it was a completely different experience.  I definitely didn’t fully appreciate the physical toll it would take, how draining it would be emotionally, or how much I would have to relinquish control to the process and just let my body do what it needed to do in response to the treatment.  Probably the biggest thing I came to appreciate was how much I needed to slow down. As a founder, there is an enormous pressure to be available 24/7, and as a woman, for everything to be done perfectly. There often doesn’t feel like we are afforded the space to slow down, but I realise now how important that is. The whole process made me have a much deeper appreciation of the lack of education and awareness out there about alternative routes to parenthood. If you’re thinking about undergoing treatment, get as much info as possible. Support is out there no matter what your circumstance is’.” Asher’s egg freezing journey “I discovered the importance of [egg freezing] the same day that I was diagnosed with gender dysphoria and recommended for Testosterone HRT. Luckily, this is when I was introduced to Hertility – finally some humane guidance, clarity and crucially being seen and understood as a trans person. The whole process became much clearer and felt more manageable, and honestly I started to feel inspired by the gift of being able to do this. The actual process wasn’t nearly as bad as I imagined, especially in relation to triggering my dysphoria.“ Georgia Habboo’s egg freezing journey “The reason I did this was that I had not had a period since coming off the pill (it had been 3.5 years) and I literally was getting no answers from doctors after 10,000 tests. I did the hormone testing kit which I’m SO grateful for. My AMH, which is an indicator of your egg reserve (ovarian reserve), was really low – within the range of a 55-65-year-old, so they recommended that I freeze my eggs straight away”. Daniella Abraham’s egg freezing journey “At age 30, I wasn’t anywhere near ready to have a baby. Although I wanted the option to have kids in the future, I didn’t want to feel pressured into trying sooner than I might have done just because of my ‘biological clock’. Honestly, the hardest part was deciding if the process was right for me, but in the end, I’m so glad I chose to do it. “Freezing my eggs has given me reassurance that I didn’t need to rush into making any major life decisions and given me peace of mind that I will have the option to start a family in the future when I’m ready to.” Mish’s egg freezing journey “As I approached 35, I knew I wanted to freeze my eggs. I didn’t want to feel pressured to have a baby just because of my biology. But I had no idea if I would be able to  – I knew you can only get screened on the NHS if you’re trying, so I assumed I would just have to wait until then. “That’s when I found Hertility. I took a Hertility test which allowed me to see if I had any issues in advance of starting […]

Pioneering new egg-freezing research has been published by Hertility Doctors, Dr Lorraine Kasaven and Dr Benjamin Jones. Read on for a summary of their findings on the optimal age to freeze your eggs. Quick facts: Is it worth freezing your eggs in your 40s? This is one of the most frequent questions our Doctors get asked by women over 40. The answer, to date, has been—there really isn’t enough data to answer this confidently.  So, in true Hertility fashion, where the data doesn’t exist, we make it our mission to change that. This month, two of our Hertility Doctors, Dr Lorraine Kasaven and Dr Benjamin Jones, published a new study, ‘Reproductive outcomes from ten years of elective oocyte cryopreservation,’ using data from 373 women over ten years to find out the answer to this question once and for all. Their findings suggest that women should get their eggs frozen before the age of 36 to increase their chances of successfully conceiving.  Whilst previous research focused on the number of good quality eggs successfully frozen, Dr Lorraine and Dr Ben’s research looked at the real-world outcomes. Basically—what happened when women tried to use those successfully frozen eggs to get pregnant?  The research outcomes Of the 373 women who froze their eggs, only 36 returned to use them. Those 36 women went through a total of 41 frozen embryo transfers which resulted in 12 live births.  None of those who froze their eggs after the age of 40 had a baby. 82% of the babies were born to women who froze their eggs between the ages of 36 and 39 years of age. This research therefore suggests that egg freezing is a viable option for having children later in life but it’s not a ‘fail-safe’ way of preserving your fertility.  This research indicates: One step closer to closing the gender data gap We are immensely proud to have our doctors flying the flag with such important research. This research directly arms our doctors with the most up-to-date research for patient consultations.  It’s another small step forward in our universal understanding of female reproductive health and a giant step towards empowering the lives of women everywhere to have kids (or not) on their terms.  Read the full paper here.  References:  Kasaven, L.S., Jones, B.P., Heath, C. et al. Reproductive outcomes from ten years of elective oocyte cryopreservation. Arch Gynecol Obstet306, 1753–1760 (2022). https://doi.org/10.1007/s00404-022-06711-0

Egg freezing is a fertility preservation treatment that allows your eggs to be collected, frozen and stored for potential use in the future. You might be considering it because you’d like children one day but aren’t ready yet, you haven’t met the person you want to parent with, or because a medical condition or treatment could affect your fertility. So, what does egg freezing actually do, how successful is it, and how can you decide whether it’s right for you? Quick facts: What is egg freezing? Egg freezing, or oocyte cryopreservation, is a fertility preservation treatment in which eggs are collected from your ovaries, frozen and stored so they can potentially be used in the future. The treatment starts similarly to IVF. Fertility medication encourages several eggs to mature during one cycle. Those eggs are collected during a short procedure and suitable mature eggs are rapidly frozen using a technique called vitrification. If you decide to use them later, the eggs are thawed and fertilised with sperm in a laboratory. Any embryos that develop can then potentially be transferred into the uterus. Modern vitrification has made egg freezing much more effective than older slow-freezing techniques. But there are still several steps between freezing an egg and having a baby. Not every egg survives thawing, fertilises, develops into an embryo or results in a live birth. That’s why egg freezing is best thought of as preserving an option, rather than guaranteeing an outcome.  Why do people freeze their eggs? There is no single reason to freeze your eggs. Egg freezing may be worth considering if having a biological child in the future is important to you, but there is a reasonable chance you won’t be ready to try until later, or your future fertility could be affected by a medical condition or treatment. You may know that you’d like children but don’t feel ready to start a family yet because of your relationship, finances, career, health or other circumstances. You may be considering becoming a solo parent in the future, or simply want more time to decide whether parenthood is right for you. This is often referred to as social egg freezing. Egg freezing can also be used for medical fertility preservation, for example before chemotherapy, radiotherapy or some types of ovarian surgery that could affect future fertility. It may also be considered by people at increased risk of reduced ovarian reserve or earlier menopause, or before starting hormone therapy or other gender-affirming treatment that could affect fertility. Egg freezing has become increasingly common in the UK. HFEA data show that the number of patients freezing eggs rose from around 700 in 2014 to 5,580 in 2024, although the number of cycles remained relatively stable between 2023 and 2024. However, having access to egg freezing doesn’t mean everyone needs to do it. The decision should take into account your age, health, reproductive goals, likelihood of delaying parenthood, treatment burden, cost and personal circumstances, rather than being driven by fear or pressure. Egg freezing cannot guarantee a future baby, but for some people it can preserve additional reproductive options for later. What are the benefits of freezing your eggs? The main biological benefit is that egg freezing allows you to preserve eggs at the age you are when they’re collected. Both the number of available eggs and their average reproductive potential decline with age. As eggs age, chromosomal abnormalities become more common, contributing to lower chances of conception and higher miscarriage rates. Once eggs are frozen, the success associated with using them later is strongly influenced by your age when they were collected. That means freezing eggs younger can potentially give you an additional option if you find it difficult to conceive naturally later. For some people, egg freezing can also ease some of the time pressure around family-building decisions. But there is an important trade-off: the earlier you freeze, the greater the chance that you’ll never need those eggs at all because HFEA data shows that while the number of people freezing eggs has risen considerably, the proportion returning to use them remains much lower. However, it is also important to know the limitations. Egg freezing cannot guarantee future fertility. Some frozen eggs won’t survive thawing. Some won’t fertilise. Some fertilised eggs won’t develop into embryos, and not every embryo will result in a pregnancy or live birth. It also doesn’t stop the rest of your body ageing. For example, if you freeze eggs at 30 and use them at 40, those eggs were collected when you were 30. But if they result in a pregnancy, you’ll still be pregnant at 40, so pregnancy-related risks associated with older age can still apply. Egg freezing therefore isn’t a way of “stopping your biological clock”. It’s a way of preserving some of the reproductive potential of younger eggs. How successful is egg freezing? There isn’t one egg-freezing success rate that can accurately tell you your individual chance of having a baby. Success depends on several factors, but two of the most important are your age when your eggs are frozen and the number of mature eggs available when you eventually use them. Age matters because younger eggs are generally more likely to be chromosomally normal. Outcomes are generally better when egg freezing is performed at a younger age, with many fertility specialists considering the late 20s to early 30s an optimal window, although the decision should still be individualised based on your reproductive plans, ovarian reserve and likelihood of using the eggs. Egg number matters because not every egg will progress through each stage of the process. Some eggs won’t survive thawing. Some won’t fertilise. Some fertilised eggs won’t develop into viable embryos. And some embryos won’t implant or result in a live birth. That’s also why there isn’t one magic number of eggs that guarantees a future baby. ASRM states that there isn’t enough evidence to prescribe a universal number of mature eggs that everyone should freeze to achieve a live birth. […]