Egg freezing overview

Overview

Egg freezing is a medical procedure that collects a woman's eggs (the cells needed to make a baby) and stores them so she can try to have a child later in life. It is also called oocyte (OH-oh-site) cryopreservation (cry-oh-pres-er-VAY-shun).

More women are choosing to freeze their eggs, but it is still not a routine procedure for everyone. In the UK, thousands of women have egg freezing each year, and the numbers are rising.

Egg freezing is typically considered by women who want to preserve their fertility (ability to have children) for medical or personal reasons. This includes women who are not ready to have a baby now, those facing medical treatments that may affect their ovaries (such as chemotherapy), or those with a family history of early menopause.

Symptoms

Common symptoms

• Egg freezing itself does not cause symptoms — it is a planned procedure. However, some women may experience mild bloating, mood changes, or discomfort from the hormone injections used to stimulate egg growth.

Symptoms in children

• This procedure is not performed on children. Girls who need to preserve fertility before puberty may be offered other options, such as freezing ovarian tissue.

Symptoms in older adults

• Egg freezing is not recommended after the natural menopause. Older women (over 40) may have fewer healthy eggs to freeze, and success rates are lower.

Causes

Main causes

• Women may choose egg freezing for 'social' reasons, such as wanting to delay childbearing for education, career, or not yet having a partner.
• Medical reasons: before undergoing treatments that can harm eggs, like chemotherapy for cancer, radiation therapy, or surgery to remove the ovaries.
• Genetic conditions that cause early menopause (for example, Fragile X syndrome or Turner syndrome).
• A desire to preserve fertility while waiting for a partner or donor sperm.

Risk factors

• Age: the younger you are when you freeze eggs, the better the chance of a future pregnancy. Success rates drop significantly after age 35.
• Certain health conditions like endometriosis or polycystic ovary syndrome (PCOS) may affect egg quality or the response to hormone stimulation.
• Smoking, being very overweight or underweight can reduce egg health and may lower the chances of a successful outcome.

When to see a doctor

See a doctor urgently if:

• If you have severe pain, heavy bleeding, or signs of OHSS (bloating, nausea, rapid weight gain) during or after the egg freezing process, contact your clinic or go to a hospital emergency department immediately.

Book a routine appointment if:

• If you are thinking about freezing your eggs, talk to your GP or a fertility specialist. They can explain the process, success rates, and costs.
• If you have a medical condition that might affect your fertility (like cancer, autoimmune disease, or a family history of early menopause), discuss egg freezing before starting treatment.
• If you are over 35 and considering delaying pregnancy, it is a good idea to have a fertility assessment.

Diagnosis

Egg freezing is not a diagnosis; it is a procedure. Before you start, a fertility specialist will check your ovarian reserve (how many eggs you have left) and overall health to see if you are a good candidate.

Tests that may be done

• Blood tests to check hormone levels (such as Anti-Müllerian Hormone, or AMH, and FSH).
• An ultrasound scan of the ovaries to count the number of small sacs (follicles) that contain eggs.
• Infectious disease screening (such as HIV, hepatitis) as required by law before storage.

What to expect at your appointment

The process begins with a consultation where the doctor explains the steps, success rates, risks, and costs. You will have blood tests and an ultrasound. If you decide to proceed, you will start a cycle of daily hormone injections for about 10 to 14 days. A doctor then collects the eggs in a short procedure under sedation or anaesthesia. After collection, the eggs are frozen in liquid nitrogen and stored at the clinic.

Treatment

Egg freezing is a fertility preservation technique, not a treatment for an illness. It involves a series of steps that take about 2 to 3 weeks, followed by long-term storage.

Self-care at home

• Rest and eat well during the hormone stimulation phase.
• Stay hydrated and avoid strenuous exercise after egg collection.
• Follow your clinic’s instructions about when to take the injections and attend monitoring appointments.
• Manage mild bloating or discomfort with paracetamol (as advised by your doctor) and warm compresses.

Medical treatments

The medical part involves daily injections of hormones (gonadotropins) to stimulate the ovaries to produce multiple eggs. A ‘trigger shot’ is given 36 hours before egg collection to mature the eggs. The eggs are then removed through a needle guided by ultrasound, under sedation or general anaesthesia. After freezing, the eggs are stored for future use. No specific medications are recommended here; your fertility team will tailor the medications to your body.

When is surgery considered?

Egg collection is a minor surgical procedure. It usually takes about 15 to 20 minutes and is done in a clinic or hospital. There is no other surgery involved in egg freezing itself.

Living with this condition

During the hormone injections, you may feel bloated, tired, or moody. Most women continue their normal daily activities, but you should avoid heavy lifting or intense exercise. After egg collection, you may have some spotting or cramping for a day or two. Many women return to work the next day, but rest is recommended.

Lifestyle tips

• Maintain a healthy weight and eat a balanced diet to support egg health.
• Avoid smoking and limit alcohol.
• Manage stress through gentle exercise, meditation, or talking to friends.
• Attend all monitoring appointments during the cycle — they are important for timing the egg collection.

Diet and exercise

Eat a diet rich in fruits, vegetables, whole grains, and lean protein. Stay well hydrated. Gentle walking is fine, but avoid vigorous exercise (like running or high-impact workouts) during the stimulation phase and for a few days after egg collection.

Mental health and emotional wellbeing

Egg freezing can be an emotional journey. You may feel hopeful, anxious, or uncertain about the future. Hormonal changes can also affect your mood. It is normal to have mixed feelings. Consider speaking to a counsellor who specialises in fertility to help you navigate your emotions.

Prevention

Egg freezing does not prevent anything; it preserves your ability to have children later. There is no way to prevent the natural decline in egg quality with age, but freezing your eggs at a younger age can help bypass that decline.

Vaccines

No vaccines are related to egg freezing.

Screening programmes

Before starting, you may have genetic screening tests if you have a family history of certain conditions, but this is optional. Routine screening for sexually transmitted infections (STIs) is often recommended.

Complications

Long-term outlook

Egg freezing gives many women the chance to have a biological child later in life. Success rates depend on how old you are when you freeze your eggs. For example, women under 35 who freeze at least 10 eggs have a good chance of a future pregnancy. It is important to have realistic expectations: not every frozen egg will lead to a baby. However, for many, it offers peace of mind and more reproductive choices.

Find support

External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.