At a glance
Egg or sperm freezing is a fertility preservation method that stores reproductive cells at very low temperatures so they can be used for pregnancy at a later date.
During freezing, eggs or sperm are cooled to around minus 196 degrees Celsius using a process called vitrification (ultra-rapid freezing), which turns the cells into a glass-like state and prevents ice crystals from forming inside them. The cells are then held in liquid nitrogen tanks until the person is ready to use them. When that time comes, the cells are thawed, and healthy ones are selected for fertilisation or insemination.
Medical Condition
Egg and sperm freezing is used whenever someone wants to protect their ability to have biological children in the future, either because of a medical situation or a personal choice.
- Cancer treatment: chemotherapy and radiotherapy can damage eggs and sperm, so freezing before treatment starts protects fertility.
- Other medical treatments that affect the reproductive organs, such as certain autoimmune therapies or surgeries on the ovaries or testicles.
- A medical condition that is likely to reduce fertility over time, such as endometriosis (a condition where tissue similar to the uterine lining grows outside the uterus) or early ovarian insufficiency (the ovaries slowing down before the expected age of menopause).
- Gender-affirming hormone therapy or surgery, when a person wishes to preserve their reproductive options beforehand.
- Elective social freezing, where a person chooses to preserve eggs or sperm while young and healthy, without any medical urgency.
- Donation programmes, where sperm or eggs are frozen for use by other patients.
This procedure is not suitable for everyone. A fertility specialist will review individual circumstances before recommending it.
- Patients with very low ovarian reserve (few eggs remaining) may not produce enough eggs to freeze, even after hormone stimulation.
- People with certain hormonal conditions that make ovarian stimulation unsafe.
- Sperm freezing may not be advised if sperm quality is extremely low and no suitable sperm can be collected.
- In some countries, legal or ethical restrictions affect who can access freezing and for how long cells can be stored.
Risks & Complications
Egg freezing carries a small number of recognised risks, most related to the hormone injections used to stimulate the ovaries; sperm freezing carries almost no medical risk to the donor.
- Ovarian hyperstimulation syndrome or OHSS (the ovaries over-respond to hormone injections, causing bloating, nausea, and in rare cases fluid accumulation in the abdomen): mild forms are common; severe OHSS is uncommon.
- Pelvic discomfort or bloating during the stimulation phase.
- Minor bleeding or infection at the egg retrieval site, which is a needle-based procedure done under ultrasound guidance.
- Mood changes or headaches from the hormone medications.
- The thawed eggs or sperm may not all survive the freezing and thawing process, reducing the number available for use.
- No guarantee that freezing now will result in a pregnancy later, as success depends on age at freezing, cell quality, and individual health factors.
- For sperm freezing specifically: brief discomfort during collection, and a small reduction in sperm motility (movement) after thawing is normal.
Preparation & Procedure
Preparation for egg freezing takes two to four weeks and begins before the first injection; sperm freezing requires much less preparation.
For egg freezing, the clinic usually asks patients to stop smoking and minimise alcohol for several weeks before starting hormone stimulation, as both affect egg quality. No specific fasting is required during the stimulation phase, but the egg retrieval procedure itself usually requires light sedation, so the patient stops eating and drinking for around six hours beforehand. The clinic will give precise instructions for the day of retrieval.
Blood thinners, certain hormonal medications, and some supplements may need to be paused or adjusted before treatment. The fertility team reviews all current medications at the initial consultation.
Before stimulation begins, the team runs a set of baseline tests to assess suitability and plan the hormone doses. These typically include:
- Blood tests to measure hormone levels, including FSH (follicle-stimulating hormone), AMH (anti-Müllerian hormone, a marker of egg reserve), and oestrogen.
- An ultrasound scan of the ovaries to count antral follicles (small fluid-filled sacs that each contain an immature egg) and check the uterus.
- Infectious disease screening, required by most fertility laboratories.
- For sperm donors: a semen analysis (spermiogram) to assess count, motility, and shape before and after freezing.
The egg freezing process itself follows these main steps:
- 1. Hormone stimulation: daily self-injections of gonadotropins (hormones that stimulate the ovaries to produce multiple eggs) for around 10 to 14 days.
- 2. Monitoring appointments: regular clinic visits for blood tests and ultrasound scans to track follicle growth and adjust medication if needed.
- 3. Trigger injection: a single injection to finalise egg maturation, given at a precise time set by the doctor, usually 36 hours before retrieval.
- 4. Egg retrieval (oocyte pick-up): a short procedure, usually under sedation or light anaesthesia, in which a thin needle guided by ultrasound is passed through the vaginal wall to collect eggs from the follicles. Most patients are in the clinic for a few hours.
- 5. Vitrification: the embryology laboratory immediately freezes the collected eggs using vitrification and places them in storage tanks.
- 6. For sperm freezing: the donor produces a semen sample in the clinic, the sample is processed to select the best sperm, and it is then frozen in small vials for storage.
Aftercare
Recovery after egg retrieval is usually quick; most patients feel well enough to go home within a few hours and return to light activity within a day or two, though individual recovery varies.
- The patient rests in the clinic for a few hours after retrieval until the sedation has worn off fully; a companion is needed to travel home.
- Mild cramping, bloating, and light spotting (very light bleeding) in the days after retrieval are normal and usually settle on their own.
- Strenuous exercise and sexual activity are usually avoided for about a week after retrieval.
- The clinic monitors for signs of OHSS, especially in the first week; patients are advised to contact the clinic if bloating worsens significantly, breathing becomes difficult, or urination decreases.
- A follow-up appointment is usually scheduled within one to two weeks to confirm that everything has settled and to discuss how many eggs or sperm were successfully frozen.
- The frozen cells are stored in liquid nitrogen; patients sign annual or multi-year storage agreements and pay storage fees for as long as they wish to keep the cells.
- When ready to use the cells, the patient returns to the fertility clinic to plan next steps, which may include IVF (in vitro fertilisation), embryo transfer, or artificial insemination depending on the situation.
- For sperm freezing donors: recovery is immediate, with no physical restrictions afterward.
Cost & What Determines It
The total cost of egg or sperm freezing varies widely because it combines several separate services, each priced differently depending on where the procedure is done and the patient's individual medical needs.
- Complexity of the stimulation cycle: patients who respond poorly to hormones may need higher doses or additional monitoring appointments, both of which increase the cost.
- Number of retrieval cycles: one cycle may not yield enough eggs, particularly for older patients or those with low ovarian reserve, and each cycle is priced separately.
- Hospital or clinic class and country: fertility clinic fees differ significantly between countries, and even between public and private clinics within the same city.
- Medication costs: hormone injections for ovarian stimulation are a major expense and vary by brand availability and the doses prescribed.
- Laboratory and vitrification fees: the embryology laboratory charges for processing, freezing, and quality-checking the eggs or sperm.
- Annual storage fees: cells kept in liquid nitrogen tanks attract ongoing charges for as long as they remain in storage.
- Diagnostic tests: baseline blood panels, ultrasound scans, and infectious disease screening are usually charged separately.
- Specialist consultation fees: initial and follow-up appointments with the fertility specialist.
- Anaesthesia or sedation fees for the egg retrieval procedure.
Most fertility clinic packages cover the stimulation monitoring, the retrieval procedure, the laboratory work, and the first year of storage. Medications are almost always billed separately, as are additional monitoring scans, anaesthesia, and any extra diagnostic tests ordered along the way.
BPJS Kesehatan and most Indonesian private insurance plans do not cover fertility preservation procedures carried out abroad, and many do not cover them domestically either. Patients travelling overseas for egg or sperm freezing typically pay out of pocket or use a private international health insurance plan that explicitly includes fertility treatments. Requesting a written cost estimate from the clinic before travelling, broken down by item, is the most reliable way to understand the full expense and avoid unexpected bills on arrival.
Frequently Asked Questions
How many sessions does egg or sperm freezing take?
Sperm freezing is usually done in a single visit, while egg freezing typically takes two to three weeks from start to finish. During that time, a woman takes hormone injections (medicines that stimulate the ovaries to produce several eggs at once), followed by a short egg retrieval procedure. The exact timeline depends on how your body responds to the hormones.
What does egg or sperm freezing feel like?
Sperm freezing involves only a simple sample collection, which is painless. Egg freezing involves daily hormone injections that can cause bloating, mild cramping, or breast tenderness, and the egg retrieval itself is done under sedation (a light sleep) so most women feel little or no pain during it. Some soreness and bloating in the day or two after retrieval is common.
How soon are my eggs or sperm ready to use after freezing?
Frozen eggs and sperm can be stored and used years later, so there is no urgency to use them quickly. When you decide to start a family, the stored material is thawed and used as part of an IVF or ICSI (a fertilisation method where a single sperm is injected directly into an egg) cycle. Your fertility specialist will guide you on the best timing based on your age and health at that point.
How much does egg or sperm freezing cost?
The cost depends on several factors, including whether you are freezing eggs or sperm, the number of stimulation cycles needed, the medications used during hormone stimulation, and the annual storage fees for keeping the frozen material. A written estimate from the hospital or clinic will give you a clear breakdown of all these components before you commit to treatment.
This page is general information, not a substitute for medical advice. Every case is different. Your doctor decides what is right for you.