IVF Laboratory Errors

Most of IVF happens in a laboratory you never see. Embryologists fertilize eggs, grow embryos, label and track every dish, take biopsies, and freeze and thaw embryos for later use. Each step has safeguards, and each step can also go wrong through mislabeling, careless handling, faulty equipment, bad culture conditions or poor records. A poor result is not proof of an error, since eggs fail to fertilize and embryos stop growing in careful labs too. The lab's own records are usually how the two are told apart.

What the IVF laboratory does

In vitro fertilization means joining egg and sperm in a laboratory dish. Eggs and sperm are kept in an environmentally controlled chamber, sometimes a single sperm is injected into each egg (ICSI), and staff check the embryos regularly as they grow2. European good-practice guidance covers each lab step, from receiving eggs and preparing sperm to culture, biopsy, freezing and emergency planning1.

• Fertilization: inseminating eggs or performing ICSI, then checking for fertilization 16 to 17 hours later1
• Culture: growing embryos in incubators under controlled temperature, pH and other conditions1
• Identification: labeling every patient, dish and device and tracking them through each step1
• Biopsy: removing a few cells from a blastocyst for genetic testing; guidance recommends about 5 to 10 cells1
• Freezing and storage: vitrifying embryos and keeping them in liquid nitrogen with records of their location1
• Thawing: warming embryos for transfer and recording how each one survived1

This is a broad overview. Our IVF and fertility treatment injuries hub links to pages on specific problems.

Types of IVF laboratory errors

Lab errors tend to fall into a few groups. Some have their own pages because they raise their own questions.

Labeling and identification errors

When a label is wrong or a check is skipped, the wrong egg, sperm or embryo can be used. ESHRE describes these mix-ups as serious but extremely rare1. See embryo mix-ups and sperm mix-ups for those cases.

Handling and procedure errors

Examples include a dish left out of the incubator too long, a step done at the wrong time, an embryo damaged during biopsy, or an embryo warmed by mistake. Guidance says labs should be designed to keep the time cells spend outside controlled conditions to a minimum1.

Equipment and culture-condition failures

Embryos are sensitive to their surroundings. Guidance says labs should keep temperature, pH and osmolality stable during culture, and should have an alarm system that warns staff when critical equipment fails or conditions go out of range1. A failed incubator, a gas supply problem or a defective batch of culture medium can affect many patients at once. Storage tank problems are covered on our page about frozen embryo storage failures.

Genetic testing sample errors

Biopsy samples must be matched to the right embryo from the lab to the testing company and back. When they are not, the problem is an embryo genetic testing sample mix-up.

Documentation and communication failures

A lab that records the wrong number of embryos, loses track of a device, or fails to tell the clinic or the patient about a problem can cause harm that surfaces months later, sometimes as lost or destroyed embryos.

Lab error or the biology of IVF?

This is the central question in any IVF lab case, and it should be answered honestly.

That last pattern is what led to a recall in 2023. The maker of an embryo culture medium told the FDA it had seen “a sudden increase in complaints” for three lots, and that performance issues may lead to impaired embryo development before the blastocyst stage8.

Laboratory safeguards and standards

Oversight of embryology labs comes from several places. A 1992 federal law directed the CDC to develop a model program for certifying embryo laboratories for states to adopt. It calls for standards on quality control, record keeping, preventive maintenance and personnel records5. The main U.S. fertility society publishes minimum standards meant to meet or exceed what the CDC suggested for certifying ART labs4.

Safeguards professional guidance describes

Unique labeling

Every patient, sample and product should be uniquely labeled before any procedure begins and throughout the process1.

Witnessing

Key steps where samples could be misidentified should be witnessed, manually or electronically, with protocol deviations graded and reported13.

Culture conditions

Temperature, pH and osmolality should be kept stable, and alarms should warn of equipment failure1.

Media checks

Each batch of commercial culture medium should arrive with quality-control documentation for that batch1.

Incident system

Labs should have a documented system for non-conformities, incidents, adverse events and complaints1.

Guidance is honest about limits. ESHRE says electronic witnessing does not reduce risk to zero1, and it notes that following its recommendations does not guarantee an outcome or establish a standard of care1. That is why a review looks at what the lab actually did, not only at what the guidance says.

Culture media recalls and other reported lab problems

Problems that start outside the clinic can still reach the lab bench. The FDA's recall database lists two recalls of embryo culture media made by CooperSurgical:

Embryo culture media recalls

1. January 2023

   A recall letter goes to customers after the company learns a lot of a single-step culture medium may contain a different medium lacking the protein embryos need. FDA lists the cause as labeling change control9.

2. December 13, 2023

   The company sends urgent recall notices for three lots of another embryo culture medium, telling labs to quarantine the product8.

3. January 2024

   ABC7 reports that two Los Angeles couples have sued, alleging the medium killed their embryos. The company says it initiated the recall while it continued to investigate10.

4. February 14, 2024

   FDA posts the December recall as Class 2, with the cause listed as under investigation by the firm8.

The lawsuits' claims are allegations, and a recall is not a finding that any particular embryo was harmed. For an affected patient, the key records are the lab's stock records, which guidance says should link each product batch to specific procedures and patients1.

How IVF lab incidents are investigated and disclosed

Good-practice guidance says mismatches and near misses should be investigated, sometimes with a structured root cause analysis, to find weak points in the system rather than to blame one person1. A 2026 U.S. committee opinion gives labs a framework for grading and reporting protocol deviations3.

Telling the patient is less consistent. In a 2022 survey of 387 professionals working in fertility centers, 52 percent said their centers always told patients about incidents, while 11.7 percent said they did not disclose them. The authors called for more transparent communication with patients11. If you suspect a lab problem, it is fair to ask in writing whether any incident report or deviation was recorded for your cycle.

How a lab error can affect you

• Fewer usable embryos, or none, from a cycle
• Loss of embryos that cannot be replaced at your age
• Another retrieval, with more medication and procedures
• Wrong or unclear genetic results that change your choices
• Use of the wrong egg, sperm or embryo
• Added costs, missed work and delays in treatment
• Grief, distrust of future care and strain at home

Questions an IVF lab error lawyer will ask

Every IVF lab error claim depends on the records. An IVF lawyer reviewing your case will usually want to know:

• Which lab steps were involved, and on what dates?
• Do the embryology worksheets and witnessing logs match each other?
• Was there an equipment alarm, recall or reported incident at that time?
• Did other patients have unusual results in the same period?
• Which lots of culture media and supplies were used?
• What did the clinic tell you, and when?
• Which state's law applies, and what notice or expert steps it requires?

Who may be responsible

A lab error claim depends on facts, not on assumptions. Depending on what happened, it may involve:

• The fertility clinic or hospital program
• The embryology lab or the company that runs it
• Individual embryologists or the lab director
• A genetic testing laboratory
• A maker of culture media, incubators or other lab products
• A storage facility or courier, where those steps were involved

Filing deadlines for an IVF lab error claim

Lab error claims may be treated as medical malpractice, ordinary negligence, contract or product liability, and each can carry its own deadline. Many states also require notice, an expert affidavit or other steps before suit.

New York is one example. Its medical malpractice claims generally must be filed within two years and six months of the act or omission, or of the last treatment when treatment for the same condition was continuous12. A product claim against a media maker may follow different rules. Because the clock may start before you know everything, talk to a lawyer early.

Tell Us Your Story →

Embryology records that matter

Records to request

Lab worksheets

• Egg retrieval and sperm preparation records
• Fertilization checks and daily embryo grading
• Biopsy, freezing and thawing records
• Witnessing or electronic tracking logs

Equipment and supplies

• Culture media and supply lot numbers for your dishes
• Incubator and alarm logs for your dates
• Any recall notice the clinic received

Reports and messages

• Incident or deviation reports
• Emails, portal messages and call notes
• Bills and explanation-of-benefits statements

What happens after you contact CBW Law

From first call to an answer

1. Share your story

   Tell us what happened in your cycle and what the clinic said.

2. Gather the lab file

   With your permission, we request the embryology records, not just the clinic chart.

3. Separate error from biology

   We compare the records against lab guidance and the known limits of IVF.

4. Talk through options

   We explain what we found, the deadlines, and whether we can help.

An unsuccessful cycle is not a case, but a preventable lab error deserves a real answer.

Plain English

Medical, Health & Insurance

Embryology records are full of shorthand. These terms come up most often in lab error reviews.

Lab procedures

ICSI

Intracytoplasmic sperm injection: injecting a single sperm directly into an egg2.

Insemination

Placing sperm with eggs in a dish so fertilization can happen2.

Trophectoderm biopsy

Removing a few outer cells from a blastocyst for genetic testing1.

Vitrification

Fast freezing that prevents ice crystals from forming in the cells.

Embryo development

Fertilization check

Looking at eggs about 16 to 17 hours after insemination to see which fertilized1.

Embryo arrest

When an embryo stops dividing. It is common and is often biological6.

Blastocyst

An embryo about five or six days after fertilization, with an inner cell mass and outer layer.

Quality and safety

Witnessing

A second person or electronic system confirming identity at key steps3.

Culture medium

The nutrient solution embryos grow in. Each batch should come with quality-control documentation1.

Non-conformity

Any departure from the lab's procedures, which should be documented and reviewed1.

Insurance and billing

Explanation of benefits (EOB)

A health plan statement showing what was billed, paid and owed for each service.

Embryology charges

Separate bills for lab work such as ICSI, culture, biopsy and freezing. They show which services were performed.

Prior authorization

A plan's approval before treatment. These records can help confirm cycle dates.

Questions

Frequently asked IVF laboratory error questions

Short answers to what patients ask about lab problems.

If my eggs did not fertilize, was it a lab error?

Not necessarily. Fertilization failure happens in routine practice, and one study linked it to patient factors such as lower sperm quality7. A lab error is more likely when records show a deviation, an equipment problem or results far outside the clinic's usual pattern.

All my embryos stopped growing. Should I suspect the lab?

Embryo arrest is common and is often biological6. It is worth asking questions if many patients saw the same drop at the same time, if an alarm or recall coincided with your cycle, or if the lab cannot produce clear records.

Can I sue an IVF lab for a mistake?

Possibly. Claims can be brought against clinics, labs and product makers, depending on the facts. Whether you have a claim depends on what the records show, what caused the harm and your state's law. An IVF lawyer can review the file and tell you what may apply.

What was the IVF culture media recall?

In December 2023, a company recalled three lots of an embryo culture medium after a sudden increase in complaints, saying performance issues may impair embryo development8. Lawsuits alleging embryo loss followed, and the company said it was investigating10. The lawsuits' claims are allegations.

How do I know which culture media lot was used for my embryos?

Ask the clinic for the lab's media and supply records for your cycle. Guidance calls for stock systems that track media and link each batch to specific procedures and patients1. Compare those lot numbers with any recall notice the clinic received.

Does my clinic have to tell me about a lab error?

Practices vary. A 2022 survey found that about half of responding centers always told patients about incidents, while 11.7 percent did not11. If you suspect a problem, ask in writing for any incident or deviation reports from your cycle.

Are embryology labs regulated?

Federal law directed the CDC to create a model certification program for embryo labs that states may adopt5. Professional societies also publish minimum standards and lab guidance14. Oversight still varies by state and accreditation, so a review looks at which standards the lab followed.

How long do I have to bring an IVF lab error lawsuit?

It depends on the state and the type of claim. New York, for example, generally allows two years and six months for medical malpractice12. Product claims can follow different rules, and some states require notice or an expert statement before suit.

What records should I request?

Ask for the full embryology file: fertilization and grading worksheets, witnessing logs, biopsy and freezing records, media lot numbers, incubator or alarm logs for your dates, and any incident report. A standard records request may leave these out, so name each one.

Tell Us Your Story

IVF labs handle everything from fertilization to freezing, and most poor results reflect biology, not mistakes. When labeling, handling, equipment, culture conditions or records fail, the lab file usually shows it.

If you believe a lab error affected your treatment, CBW Law can review what happened with you and tell you honestly whether we can help.

Tell Us Your Story →Call (800) 476-2416

This page is general information about IVF laboratory errors. It is not legal or medical advice and does not create an attorney-client relationship. An unsuccessful cycle, a complication, an embryo loss or a testing limitation does not, by itself, establish that anyone was negligent. No outcome can be promised in any case.