Both work. ASRM’s 2021 guideline found no significant difference in per-transfer pregnancy rates between frozen and fresh donor eggs and calls frozen donor eggs a reasonable option. The bigger practical differences are how many eggs you get (a fresh cycle gives you the donor’s whole retrieval; an egg bank sells a fixed lot), timing (frozen eggs need no cycle synchronization), and cost structure. One large US registry analysis did find lower live birth rates with frozen donor eggs, so ask any program for its own results with each.
Two ways to get donor eggs
Fresh donor cycle: a donor is matched to you, goes through ovarian stimulation and retrieval, and her eggs are fertilized right away with your partner’s or donor sperm. Embryos can be transferred fresh to you (if your cycle is synchronized with hers) or frozen for later.
Frozen egg bank: a donor has already been stimulated and her eggs were vitrified. You buy a lot of eggs, which are shipped to your clinic and warmed when you are ready, with no need to coordinate with the donor.
For the full donor-egg process, see our donor egg IVF guide. This page focuses only on the fresh-or-frozen choice.
What the evidence shows
ASRM’s 2021 guideline on outcomes after egg freezing reviewed the donor-egg studies. Its summary statements:
- “There are no significant differences in per transfer pregnancy rates with cryopreserved vs. fresh donor oocytes.”
- “Previously cryopreserved donor oocytes are a reasonable option compared with fresh donor oocytes.”
- As the number of donor eggs warmed increases, cumulative live birth rates increase.
- Neonatal outcomes appear similar between vitrified and fresh donor eggs.
The studies behind those statements do not all agree, and it is worth knowing why:
| Study (as summarized by ASRM) | Design | Fresh | Frozen |
|---|---|---|---|
| Cobo et al., 2010 | Randomized trial, ongoing pregnancy | 43% | 41% (not significant) |
| Trokoudes et al., 2011 | Live birth | 41.5% | 47.2% (not significant) |
| Kushnir et al., 2018 | US SART registry, live birth per recipient cycle start | 51.1% | 39.7% |
| Kushnir et al., 2018 | Same data, live birth per embryo transfer | 56.4% | 45.3% |
The registry analysis is large but aggregates many clinics, and ASRM lists that aggregate design as a limitation. One plausible contributor is that a fresh cycle usually gives a recipient more eggs than a frozen lot, and more eggs means more embryos to try. Single-center studies in experienced labs have shown similar results with either. The practical lesson: the lab matters, and you should ask a clinic for its own outcomes with frozen versus fresh donor eggs.
Fresh vs frozen: the practical differences
| Fresh donor cycle | Frozen egg bank | |
|---|---|---|
| Eggs you get | The donor’s whole retrieval (or a share, in split programs) | A fixed lot, set by the bank |
| Timing | Weeks to months: matching, screening, synchronized stimulation | Faster; eggs ship when you are ready |
| Cycle risk | Donor can respond poorly or drop out | Eggs already exist; risk is warming survival |
| Donor choice | Agency or clinic donors; known donors possible | The bank’s catalog only |
| Extra embryos for siblings | More likely, if the retrieval is large | Depends on lot size; some banks sell larger lots or guarantees |
| Cost structure | Donor compensation, agency fees, donor medications and monitoring, plus your IVF | Price per lot plus your clinic’s warming, ICSI and transfer fees |
We have not listed prices because they vary widely by program, and lot sizes and guarantees differ between banks. Ask for a written quote that shows the number of eggs included.
Choose frozen for speed and simplicity, fresh for more eggs and wider donor choice.
- Usually discussed when
- You have decided on donor eggs and are choosing a program.
- Main upside
- Frozen: faster, no synchronization. Fresh: more eggs, more chance of sibling embryos, known-donor option.
- Main tradeoff
- Frozen lots are smaller; fresh cycles take longer and can be cancelled if the donor responds poorly.
Donor screening rules apply either way
In the US, egg donors are regulated by the FDA under 21 CFR Part 1271. Donors must be screened and tested for infectious diseases, including HIV, hepatitis B and C, syphilis, and, for reproductive donors, chlamydia and gonorrhea. For egg donors, the testing specimen can be collected up to 30 days before retrieval. ASRM’s 2024 gamete and embryo donation guidance adds professional recommendations, including that egg donors be limited to six stimulation cycles. Our page on the egg donor selection process explains how clinics and agencies apply these rules, including genetic carrier screening.
Middle options: shared cycles and guarantees
The choice is not always binary. Some programs offer:
- Shared or split fresh cycles, where one donor’s retrieval is divided between two or more recipients. This lowers the cost of a fresh cycle but also reduces the number of eggs each recipient gets. Ask how eggs are divided and what happens if the retrieval is small.
- Frozen-egg guarantees, where a bank or clinic promises a minimum outcome, such as a set number of blastocysts, or offers a replacement lot or partial refund if it is not met. Read the definition of the outcome carefully; a guarantee of blastocysts is not a guarantee of a baby.
- Multi-lot purchases from the same frozen donor, which can approximate the sibling potential of a fresh cycle. Ask whether additional lots from that donor are still available before you commit, because popular donors sell out.
Using donor eggs abroad
Donor rules differ by country: whether donors can be anonymous, whether they can be paid, how many families one donor may help, and what information children can later access. If you are considering donor-egg IVF outside the US, ask the clinic to explain local donor rules in writing, including how donors are screened and whether your child could ever obtain identifying information. Those rules affect your family long after treatment.
Thinking about disclosure early
Whichever route you choose, consumer DNA testing means donor anonymity can no longer be assumed; ASRM’s 2024 guidance notes that anonymity is decreasing as genetic testing becomes more accessible. Many families now plan from the start how and when they will tell their child. Counseling with a mental health professional experienced in donor conception is commonly offered and is worth taking.
Who tends to choose which
Frozen bank often fits when
- You want to start soon or have a fixed time window.
- You want one child and are comfortable with a smaller lot.
- Your clinic has strong warmed-egg results.
- You are traveling for treatment and want fewer moving parts.
Fresh donor cycle often fits when
- You hope for more than one child from the same donor.
- You want a specific donor or a known donor.
- You want a full retrieval’s worth of eggs to maximize embryo numbers.
If you are still deciding whether donor eggs are the right step, HowToHaveABaby’s realistic options after 40 and its guide for donor-conceived families are good places to start, and our comparison of embryo adoption and donor embryos covers another route.
- What are your live birth rates per transfer and per recipient with frozen versus fresh donor eggs?
- For frozen eggs: what is your egg survival rate after warming, and how many eggs are in a lot?
- Do you offer a guarantee (for example, a set number of blastocysts or a refund)? What are the conditions?
- For fresh cycles: what happens if the donor responds poorly or withdraws? Do I pay again?
- Are eggs from a fresh cycle shared with other recipients?
- What donor information, and what future contact options, are available?
If you are comparing doctors as well as programs, FertileStart explains what a reproductive endocrinologist does. To check published results, see our guide to reading SART data.
- Donor-Conceived Families: What Every Parent Should Know Before Starting (HowToHaveABaby)
- Fertility After 40: Realistic Options and What the Data Shows (HowToHaveABaby)
- What Is a Reproductive Endocrinologist (RE)? And When Do You Need One? (FertileStart)
Compare donor egg programs in Colombia
Some patients compare donor-egg IVF at accredited clinics in Colombia. Ask any program whether it uses fresh or frozen donor eggs, how many eggs are included, how donors are screened, and for a written all-in quote and its own outcome data.
Questions? Message us on WhatsApp and we’ll point you to clinics and next steps. We may earn referral fees from partner clinics.
Frequently asked questions
Are frozen donor eggs as good as fresh?
ASRM’s 2021 guideline found no significant difference in per-transfer pregnancy rates and calls frozen donor eggs a reasonable option. A large US registry analysis did report lower live birth rates with frozen donor eggs, so results depend on the lab.
How many eggs come in a frozen donor egg lot?
It varies by bank. Ask how many eggs are in the lot you are buying and whether any guarantee applies.
Why do fresh donor cycles take longer?
The donor must be matched, screened and stimulated, and if you want a fresh transfer your cycle must be synchronized with hers.
Are donor egg babies from frozen eggs healthy?
ASRM’s review found that neonatal outcomes appear similar between vitrified and fresh donor eggs.
How many times can an egg donor donate?
ASRM’s 2024 donation guidance recommends limiting egg donors to six stimulation cycles.
Sources & guidance
- ASRM Practice Committee: Evidence-based outcomes after oocyte cryopreservation for donor oocyte IVF and planned oocyte cryopreservation, a guideline (2021). Fertil Steril 2021;116:36-47
- ASRM: Gamete and embryo donation guidance (2024). Fertil Steril 2024;122:799-813
- eCFR: 21 CFR Part 1271, Subpart C, Donor eligibility (1271.80, 1271.85)