fertility preservation
egg + embryo banking calculator
Start with the number of children you want, then compare egg freezing with embryo banking. Add any completed cycles and see the expected losses from retrieval to transfer. If embryos are tested, euploid counts are known only after PGT-A results return.
calculator
1 family goal
2 banked already
cycle 1 12 eggs at age 25
cycle 2 12 eggs at age 25
cycle 3 12 eggs at age 25
cycle 4 12 eggs at age 25
cycle 5 12 eggs at age 25
3 future cycle
one retrieval
16 retrieved eggs gives about 12 mature eggs.
- mature
- 74%
- egg thaw
- 95%
- fertilization
- 73%
- euploid
- 57%
- blast
- 57%
- transfer
- 60%
assumptions
plan
target
21mature eggs
- banked chance
- 44%
- planning target
- 80%
- one retrieval
- 16 retrieved -> 11.8 eggs
- retrieval estimate
- 2 retrievals
eggs versus embryos
Eggs and embryos are not interchangeable banked units. A frozen egg is still before fertilization, embryo growth, and any genetic testing. A frozen embryo has already passed some of those checkpoints.
Egg freezing keeps sperm choice open. That matters if you do not yet know whose sperm you want to use, or if you do not want to create embryos now. The tradeoff is uncertainty: a mature egg count does not yet tell you how many eggs will survive warming, fertilize, become blastocysts, produce euploid embryos, or lead to a live birth.
Embryo banking gives more information earlier. You learn whether the eggs fertilize with the sperm source used in that cycle and whether embryos grow far enough to freeze. A high egg count can still become a low embryo count if survival, fertilization, blastocyst development, or euploidy is poor.
Egg thaw is also different from embryo thaw. A mature egg is one large cell; if it does not survive warming, that entire unit is gone before fertilization can be tried. A blastocyst is multicellular and has already passed fertilization and several days of development before freezing. Embryos still have to survive warming and transfer, but an egg count and an embryo count should not be compared one-for-one.
PGT-A results only exist after embryos are made and tested. If you already have confirmed euploid embryos, enter them directly. If you are planning an embryo cycle, euploid embryos appear only as an expected result in the funnel.
what waiting changes
This moves the cycle age forward while keeping the same family goal. Later ages usually mean fewer retrieved eggs and a lower usable-embryo rate, so the retrieval plan can change quickly.
receipts
- Goldman RH, Racowsky C, Farland LV, Munne S, Ribustello L, Fox JH. Predicting the likelihood of live birth for elective oocyte cryopreservation: a counseling tool for physicians and patients. Hum Reprod. 2017;32(4):853-859. Human Reproduction
- Cascante SD, Grifo JA, Licciardi F, et al. The effects of age, mature oocyte number, and cycle number on cumulative live birth rates after planned oocyte cryopreservation. J Assist Reprod Genet. 2024;41:2979-2985. Springer Nature
- ASRM Practice Committee. Testing and interpreting measures of ovarian reserve. Committee opinion, 2020. ASRM
- ASRM Practice Committee. A review of best practices of rapid-cooling vitrification for oocytes and embryos. Committee opinion, 2021. ASRM
- ASRM Practice Committee. Fertility preservation in patients with medical indications. Committee opinion, 2026. ASRM
- ASRM Ethics Committee. Planned oocyte cryopreservation to preserve future reproductive potential. Ethics opinion, 2023. ASRM
- Predicting the ovarian response: towards a determinant model and its application in controlled ovarian stimulation. PMC
- Comparing Day 5 versus Day 6 euploid blastocyst in frozen embryo transfer: clinical outcomes and predictive model. PMC
- CDC. ART Success Rates. CDC