How long do embryos last in storage?

Editorial team Published on

Embryos can be stored indefinitely in liquid nitrogen because freezing stops all biological activity.

Storage Facts

  • No expiration: Cryopreservation in a special facility has no set time limit for tissue viability.
  • Record success: Healthy babies have been born from embryos stored for up to 30 years.
  • Quality matters: Success depends on the age and quality of the embryo when frozen, not how long it stayed in storage.

Legal Rules

  • Time limits: Some countries or regions place legal caps on storage length, such as a maximum of 55 years in the UK system.
  • Consent: Both biological providers must agree on keeping or using the stored material.

Is 2 frozen embryos good for IVF?

Having two frozen embryos from an IVF cycle is a solid and positive result, giving you a strong statistical chance at a successful pregnancy while allowing for single embryo transfers.

What Having Two Embryos Means

  • Chances of Success: A single high-quality, genetically tested (euploid) embryo typically yields a high implantation success rate (often around 60% to 65% per transfer). Having two means you have two distinct chances at a healthy pregnancy.
  • Transfer Strategy: Modern medical guidelines from groups like the American Society for Reproductive Medicine strongly recommend transferring one embryo at a time. This practice—known as elective single embryo transfer—minimizes the dangerous health risks of a twin pregnancy, such as preterm birth or low birth weight.
  • Cumulative Potential: If the first embryo transfer does not result in a live birth, having a second frozen embryo stored safely gives you a reliable backup plan for a subsequent frozen embryo transfer.

How expensive is storing embryos per year?

Storing frozen embryos typically costs between $500 and $1,000 per year at most standard fertility clinics in the United States.

Annual Storage Cost Breakdown

  • Standard Clinic Fees: Most clinics charge a flat yearly fee of $600 to $1,000, regardless of whether you are storing one embryo or ten.
  • Specialized Long-Term Facilities: Off-site or specialized cryogenic storage companies (like HavenCryo) sometimes offer lower rates, averaging around $395 to $600 per year, or multi-year discounts.
  • Tiered Pricing: A few medical centers or hospital systems may scale prices upward over time, starting around $600 in the first year and rising past $1,000 for extended years.

Important Details to Know

  • Quantity Doesn't Change the Price: You pay a flat rate per tank or per patient account, meaning the total number of stored embryos does not increase your annual bill.
  • Initial Year Inclusion: The first year of storage is frequently bundled into the total cost of your IVF or embryo creation cycle.
  • Insurance Coverage: Standard health insurance plans typically do not cover elective or long-term embryo storage, though you may be able to use an FSA or HSA depending on your plan administrator.

Can you freeze an embryo for 27 years?

Yes, you can freeze an embryo for 27 years, and a healthy baby was successfully born from an embryo stored for that exact length of time.

How It Works

  • Liquid Nitrogen: Embryos are kept in special tanks filled with liquid nitrogen at extremely cold temperatures (-196°C or -320°F).
  • Stopped Activity: This extreme cold completely stops all cellular activity and biological time.
  • Vitrification: Modern clinics use Vitrification, a flash-freezing method that turns the liquid inside the cells into a safe, glass-like state without forming damaging ice crystals.

Key Facts

  • No Expiration: There is no known technical expiration date for frozen embryos.
  • The Record: The longest recorded storage time to result in a live birth is 27 years, achieved when a baby named Molly was born in 2020 from an embryo frozen in 1992.
  • Success Rates: Storage time does not lower the quality of the embryo; survival rates upon thawing remain very high (over 90% to 95% with modern methods).

Can you freeze an embryo without killing it?

Yes, you can freeze an embryo without killing it using a rapid flash-freezing process called vitrification.

How It Works

  • Stop biological time: Technicians replace water inside the cells with special protectants, then submerge the embryo in liquid nitrogen at -196°C (-321°F).
  • Prevent ice damage: Vitrification turns the liquid inside the cells into a safe, glass-like state instead of forming sharp ice crystals that break cell walls.
  • High survival rate: Over 90% to 95% of high-quality embryos survive the thawing process and remain viable to create a pregnancy.

Storage and Safety

  • No expiration date: Embryos can stay frozen safely for decades without losing quality or increasing the risk of birth defects.
  • Successful births: Healthy babies have been born after their embryos spent more than 25 years in cryogenic storage.
  • Standard practice: Fertility clinics routinely store extra embryos from In Vitro Fertilization (IVF) for future family planning.

How long can my embryos eggs sperm be frozen for?

9 related questions found

What gender are most IVF babies?

Most babies born through standard in vitro fertilization (IVF) are male, making up about 53% to 56% of these births.

Why IVF Skews Male

Research discussed by STAT News shows that fertility treatments can slightly favor boys. Experts point to a few reasons for this pattern:

  • Faster Growth: Male embryos often grow a little faster in the lab than female embryos.
  • Embryo Selection: Doctors look for the healthiest and fastest-growing embryos to transfer. As noted by The Persistent, grading systems may accidentally give higher scores to these faster-developing male embryos.

How Techniques Change the Ratio

The exact gender split depends on the specific method used during the procedure:

  • Standard IVF: Results in a higher percentage of boys (around 53% to 56%).
  • Blastocyst Transfers: Transferring embryos after five days of growth shows a stronger lean toward male births.
  • ICSI (Intracytoplasmic Sperm Injection): This process injects a single sperm directly into an egg. It results in a more balanced gender split, or slightly more girls, closer to 49% to 50% boys.
  • Genetic Testing (PGT): If parents use testing to screen for health or choose a specific gender, the numbers change based on their direct choice.

Why eat pineapple during IVF?

Eating pineapple during IVF is a popular trend based on the idea that an enzyme inside the fruit helps with embryo implantation, though no scientific proof shows it actually boosts fertility.

The Bromelain Theory

  • The Enzyme: Pineapples contain an enzyme called bromelain, mostly found in the tough central core.
  • The Claim: Bromelain acts as a mild blood thinner and reduces inflammation.
  • The Idea: People believe eating it around the time of an embryo transfer improves blood flow to the uterus and helps the embryo stick to the uterine lining.

What Science Says

  • No Proof: Clinical studies do not show that eating pineapple or bromelain increases IVF success rates or pregnancy outcomes.
  • Low Doses: The amount of bromelain in a normal serving of fresh pineapple is too small to cause significant changes in blood flow or inflammation in the body.

A Symbol of Hope

  • Community Mascot: The pineapple is a widely recognized symbol of warmth, hope, and resilience in the fertility and IVF community.
  • Fun Tradition: Many patients eat a slice of pineapple core for a few days after a transfer as a comforting ritual rather than a medical treatment.
  • Safe Snack: Pineapple is safe, delicious, and rich in Vitamin C and fiber, making it a healthy addition to a normal diet. You do not have to eat it, and skipping it will not hurt your chances.

Does insurance pay for freezing embryos?

Health insurance pays for freezing embryos only if it is considered medically necessary or if your employer or state mandates comprehensive fertility benefits.

When Insurance Covers Embryo Freezing

  • Medical necessity: If you face medical treatments that threaten your fertility—such as chemotherapy, radiation for cancer, or certain surgeries for severe endometriosis—insurance is much more likely to cover the process.
  • State laws: Some states require private insurers to cover fertility preservation and treatments like IVF when a medical condition or an infertility diagnosis is present.
  • Employer benefits: If your employer offers a robust or specialized fertility package (through providers like Progyny or WINFertility), elective or social embryo freezing may be partially or fully covered.

When Insurance Does Not Cover It

  • Elective reasons: If you are freezing embryos for personal, social, or age-related reasons (like delaying pregnancy for a career), standard health insurance usually classifies it as an elective procedure and denies coverage.
  • Standard plans: Traditional or basic health insurance plans, Medicaid, and many employer-sponsored policies exclude elective fertility preservation and storage fees.
  • Partial gaps: Even when some diagnostic testing or doctor consultations are approved, medications, the retrieval procedure, and annual storage fees often require out-of-pocket payment.

You can learn more about general options through resources like NYU Langone Health or CCRM Fertility.

At what age is IVF most successful?

In vitro fertilization (IVF) is most successful when the person providing the eggs is under 35 years old, with the highest success rates typically seen in the late 20s to early 30s.

Success Rates by Age Group

According to data from the Centers for Disease Control and Prevention (CDC) and reproductive technology registries, live birth rates per egg retrieval cycle drop as maternal age increases:

  • Under 35: About 50% to 55% chance of a live birth per intended retrieval.
  • 35 to 37: About 38% to 45% chance of a live birth.
  • 38 to 40: About 25% to 35% chance of a live birth.
  • 41 to 42: About 10% to 20% chance of a live birth.
  • Over 42: Less than 5% to 10% chance of a live birth using their own eggs.

Why Age Matters

  • Egg Quality: Younger eggs have a much higher chance of being chromosomally normal.
  • Egg Quantity: Ovarian reserve (the total supply of eggs) is higher at younger ages.
  • Alternative Options: For patients over 40, using younger donor eggs can raise success rates to levels comparable to younger age brackets.

What are the downsides of freezing embryos?

The main downsides of freezing embryos include legal and relationship disputes if partners split, high upfront costs, and the small risk that an embryo will not survive the thawing process.

Ethical and Relationship Concerns

  • Custody disputes: If you freeze embryos with a partner and you separate later, you may face legal battles over what to do with them, as you cannot "unfertilize" them.
  • Moral dilemmas: Deciding what to do with unused or leftover embryos—such as discarding them, donating them for research, or donating them to another family—can cause deep emotional and ethical stress.

Medical and Procedural Risks

  • Thawing loss: While survival rates are high (usually over 95%), a small percentage of embryos can still be damaged or fail to survive the thawing process.
  • No pregnancy guarantee: Freezing and transferring an embryo does not ensure a successful pregnancy or live birth.
  • Retrieval side effects: The process requires ovarian stimulation and an egg retrieval procedure, which can cause side effects like cramping, bloating, and the rare risk of ovarian hyperstimulation syndrome (OHSS).

Financial Costs

  • Upfront and ongoing expenses: Creating embryos involves fertilization costs and often genetic screening in addition to the retrieval procedure.
  • Storage fees: You must pay yearly maintenance fees to keep the embryos frozen safely in a lab facility.