Fertility by Age & Egg Freezing Calculator: Monthly Odds, Euploid Rate & Eggs Needed

⏳ Age Fertility & Egg Freezing Calculator

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Age (now, or at egg freezing)

Mature eggs (MII) frozen or planned

Calculator Fertility by age chart Egg freezing guide FAQ

Fertility by Age Chart: Monthly Odds, Euploid Embryos & Eggs Needed

Population averages from ASRM/ACOG guidance, euploidy data (Franasiak et al., Fertil Steril 2014) and the egg-freezing live-birth model of Goldman et al. (Hum Reprod 2017).

Age	Monthly natural chance	Within 1 year	Euploid embryos	Eggs for 70% live birth
25	25%	97%	≈70%	11
30	25%	97%	≈70%	11
33	20%	93%	≈60%	12
35	15%	86%	≈50%	15
37	15%	86%	≈50%	15
38	10%	72%	≈38%	22
40	10%	72%	≈38%	22
42	5%	46%	≈25%	40
44	2%	22%	≈12%	80

Egg Freezing: How Many Eggs Do You Need?

Age at freezing matters more than age at use — eggs keep the quality of the age they were frozen.
Under 35, about 10–15 mature eggs gives a good chance of one baby; at 38–40 it often takes 20–30.
Each stimulation cycle typically yields 8–15 eggs, depending largely on AMH.
Vitrified eggs survive thawing ~85–95% of the time.
These are averages — individual results vary with AMH, health and lab quality.

Frequently Asked Questions

What are the chances of getting pregnant each month by age?

Roughly 25% per cycle in your 20s, about 20% at 30–34, 15% at 35–37, 10% at 38–40 and 5% or less after 41, for couples without known fertility problems.

How many eggs should I freeze?

Under 35, around 10–15 mature eggs gives roughly a 65–80% chance of at least one baby; at 38–40 you may need 20–30 eggs for a similar chance.

What is the best age to freeze eggs?

Ideally before 35. Freezing in your early 30s generally needs fewer cycles and gives higher live-birth chances per egg.

Why does fertility decline with age?

Both the number of eggs (ovarian reserve) and the share of chromosomally normal eggs fall with age, which lowers conception rates and raises miscarriage risk.

Is this calculator a guarantee?

No. It provides population-based estimates. Your AMH, health, partner’s sperm and clinic quality all influence real outcomes.

⚠️ Official Medical Disclaimer

This calculator is for informational and educational purposes only. It produces mathematical estimates based on published clinical literature (ACOG, ASRM, ESHRE, NICE, WHO, NEJM) and is not a medical diagnosis, treatment plan, or method of contraception.

Every body and every treatment cycle is different. Always discuss your results with a qualified OB-GYN, reproductive endocrinologist, or fertility specialist before making any medical decision. Seek urgent care for heavy bleeding, severe one-sided pain, fainting, or fever.

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