Egg Donor Screening Explained: What Tests Are Done?
Learn how egg donors are screened, including medical history, infectious-disease testing, ovarian reserve, genetic screening, psychological assessment, and donor safety.
Before someone can donate eggs through a fertility clinic, they usually go through a detailed screening process.
That screening has several purposes. It helps determine whether the donor is healthy enough to undergo ovarian stimulation and egg retrieval, reduces the risk of transmitting certain infections or inherited conditions, and gives the fertility team information about how the donor may respond to treatment.
The exact process varies between clinics and countries, but egg donor screening commonly includes medical and family history, infectious-disease testing, genetic assessment, ovarian-reserve testing, physical evaluation, and counseling.
Unlike sperm donation, screening also has to consider the medical risks of the donation procedure itself.
Medical history comes first
The clinic will usually begin with a detailed medical questionnaire and interview.
The donor may be asked about previous illnesses, surgeries, medications, allergies, reproductive history, menstrual cycles, previous pregnancies, fertility treatment, and other aspects of her health.
Lifestyle and behavioral factors may also be discussed where they are relevant to infectious-disease risk or treatment safety.
In the U.S., current ASRM guidance recommends medical history, physical examination, infectious-disease laboratory testing, genetic assessment, and psychoeducational counseling as part of egg donor evaluation.
EU rules similarly require non-partner reproductive-cell donors to be assessed on the basis of age, health, and medical history through both a questionnaire and a personal interview with a qualified healthcare professional.
This first stage can identify issues that need further investigation before the donor proceeds.
Family medical history matters too
A healthy donor can still come from a family with an inherited condition that deserves attention.
That is why fertility programs usually ask about parents, siblings, grandparents, and other close relatives.
ASRM recommends obtaining a detailed three-generation family history where possible. It also recommends professional genetics review when the family history suggests a possible inherited disorder.
The aim is not to find a donor whose family has never experienced illness. That would be unrealistic. The goal is to identify patterns that could affect the donor herself or a future child.
Infectious-disease testing is a core part of screening
Egg donors are tested for infections that could potentially be transmitted through donated reproductive tissue.
In the U.S., donor eligibility under FDA rules includes laboratory testing around the time the eggs are retrieved. Current ASRM guidance incorporates those requirements into egg donor screening.
At EU level, non-partner reproductive-cell donors must test negative for HIV-1 and HIV-2, hepatitis B, hepatitis C, and syphilis. Additional testing can be required depending on factors such as travel history, origin, and possible exposure to particular infections.
The exact test panel can therefore vary somewhat by jurisdiction and individual circumstances.
Egg donors are also evaluated for their own safety
This is an especially important part of egg donation.
The donor will take fertility medication designed to stimulate the ovaries so that multiple eggs mature during one cycle. She then undergoes monitoring and, eventually, a procedure to retrieve those eggs.
EU donor rules explicitly require clinicians to consider whether donation could create health risks for the donor herself, including risks associated with superovulation, sedation, and egg collection.
ASRM likewise emphasizes that egg donation involves inconvenience, discomfort, and medical risks for the donor.
So donor screening is not simply about protecting the recipient and future child. It also determines whether proceeding is medically appropriate for the person donating.
Ovarian reserve is assessed
The clinic needs some indication of how the donor's ovaries are likely to respond to stimulation.
ASRM recommends pelvic ultrasound assessment of the ovaries, including antral follicle count, and says serum biomarkers of ovarian reserve can also be useful when anticipating response to ovarian stimulation.
A commonly used ovarian-reserve marker is anti-Müllerian hormone, or AMH, although the exact testing protocol depends on the clinic.
These tests are not simply measuring whether the donor is “fertile.” They help the clinical team estimate whether stimulation is likely to produce an appropriate response and whether treatment can proceed safely.
A pelvic ultrasound may be performed
Ultrasound lets the fertility team examine the ovaries and other pelvic anatomy.
It can be used to count visible follicles and identify findings that might influence treatment.
ASRM specifically recommends pelvic ultrasound assessment, including antral follicle count, for potential egg donors.
This is one reason a donor cannot be fully approved based only on an online questionnaire or profile. Important parts of egg donor eligibility require an actual clinical examination.
Donor age is part of screening
Age matters more directly in egg donation because egg quality and chromosome risk change with age.
ASRM recommends that egg donors preferably be between 21 and 34 years old. If a donor is older than 34, recipients should be counseled about the age-related implications for pregnancy rates and chromosome risk.
In the UK, HFEA says egg donors are usually between 18 and 35, although clinics may use older donors in exceptional circumstances.
Across the EU, rules vary by country, while EU-level donor requirements require age to form part of the donor-selection assessment.
Age is therefore a clinical consideration, not simply another searchable profile characteristic.
Genetic carrier screening may be included
Genetic screening looks for inherited conditions that may not affect the donor personally but could matter to a future child.
Current ASRM guidance recommends that egg and sperm donors undergo carrier screening for conditions including cystic fibrosis, spinal muscular atrophy, and hemoglobin disorders. Broader pan-ethnic expanded carrier screening can also be appropriate.
ASRM also says Fragile X carrier screening may be considered for all egg donors and should be performed where family history suggests a potential Fragile X-related disorder.
The UK takes a somewhat different approach. HFEA states that expanded carrier screening is not currently required nationally for all egg donors, although individual clinics may offer or require it.
That is why “genetically screened” can mean different things at different clinics.
A carrier result does not automatically disqualify a donor
A donor may be completely healthy while carrying a recessive genetic condition. That is common.
If a carrier result is found, the next question is often whether the person providing the sperm carries a disease-causing variant affecting the same condition.
ASRM recommends that, where possible, the egg and sperm sources be screened for the same conditions and that a genetics professional review results when different screening panels have been used.
So a positive carrier result should not automatically be interpreted as “bad donor.” It is information that needs to be understood in context.
Psychological or psychoeducational screening may be part of the process
Egg donation has emotional as well as medical implications.
The donor is contributing genetic material that could result in a child, and that child may eventually want information or contact.
ASRM strongly recommends psychoeducational counseling for egg donors. Topics can include the implications of donation, future contact, disclosure to donor-conceived children, identity issues, and the possibility of being identified through modern DNA testing.
The exact counseling requirements vary by country and program. The aim is not to judge someone's personality. It is to make sure the donor understands what she is consenting to.
Previous fertility is not always required
Some donors already have children, while others have never tried to become pregnant.
ASRM says proven fertility is desirable but not required for an egg donor.
Instead, clinics rely on age, medical history, ovarian-reserve assessment, ultrasound findings, and other clinical information.
Having had a child previously may provide useful information, but it does not replace donor screening.
What happens if the donor has donated before?
Previous egg donation can provide useful information about how the donor responded to ovarian stimulation.
A clinic may review:
- how much medication was needed;
- how the ovaries responded;
- how many eggs were retrieved;
- whether there were complications;
- how many previous donation cycles have occurred.
Repeated egg donation deserves particular attention because each cycle exposes the donor to additional stimulation and another retrieval procedure.
ASRM explicitly notes that repeated donation increases cumulative exposure to the inconvenience and risks of egg retrieval.
The clinic should therefore consider the donor's previous history before approving another cycle.
A donor can be rejected or deferred
Not every person who wants to donate eggs will be medically approved.
A donor might be declined because of significant medical history, infectious-disease results, hereditary risk, ovarian response concerns, or another finding discovered during assessment.
Some situations may simply require additional testing. Others may make donation inappropriate.
Individual clinics can also apply eligibility criteria beyond legal minimums. HFEA notes, for example, that some UK clinics use their own BMI requirements.
Being rejected from a donor program does not necessarily mean someone is generally unhealthy. It may mean that donation or ovarian stimulation is not appropriate under that program's criteria.
Known egg donors need screening too
If your potential donor is your sister, friend, acquaintance, or someone you found through Banbino or another online platform, the same principle applies.
Knowing the person does not replace medical assessment.
ASRM states that directed or known egg donors should undergo the same infectious-disease screening and testing used for nondirected donors.
A known donor may give you much richer personal information, but the fertility clinic still needs to determine whether donation is medically appropriate. This is especially important in egg donation because the donor herself undergoes treatment.
Screening through Banbino and screening through a clinic are different things
A platform can verify certain kinds of information.
For example, Banbino may help intended parents discover egg donors based on profile characteristics, family-building intentions, location, identity, or other preferences. Identity verification can also help establish that the person behind the profile is real.
But medical screening is different.
A platform should not turn a donor's self-reported health information into a claim that they are clinically approved.
Ovarian reserve, infectious-disease testing, genetic results, and suitability for stimulation need appropriate professional evaluation.
Banbino can help answer:
Is this someone I want to consider?
The fertility clinic answers:
Can this person safely and appropriately donate eggs?
Ask what “screened” actually means
If you are reviewing an egg donor profile, avoid relying on one word.
Ask what was actually done.
Was her medical history reviewed professionally? Was family medical history collected? Which infectious-disease tests were performed? Was ovarian reserve assessed? Was pelvic ultrasound performed? What genetic screening was completed? Has she donated before? Was counseling provided? When were the tests performed?
This becomes especially important when comparing donors from different agencies, clinics, or countries because their screening protocols may not be identical.
Screening does not guarantee a healthy child
Even very thorough donor screening has limits.
Genetic tests do not detect every possible inherited condition. Family histories can be incomplete. A donor may develop a medical condition years after donation. And no fertility treatment can guarantee a particular pregnancy outcome.
ASRM explicitly notes that screening can reduce risks but cannot completely eliminate the possibility of transmitting infectious or genetic conditions.
That does not make screening ineffective. It simply means the purpose is risk reduction and informed decision-making, not certainty.
Egg donor screening protects three people
It is easy to think of screening only as protection for the future child.
In reality, a responsible process considers three people.
It protects the intended parent by reducing infectious and reproductive risks.
It helps reduce known risks for the future child through family-history and genetic assessment.
And importantly, it protects the donor by determining whether ovarian stimulation and egg retrieval are medically appropriate for her.
That last part is what makes egg donor screening particularly important.
A donor profile can tell you who you might want to choose. A proper screening process determines whether moving from that profile to an actual egg donation is safe and appropriate.