No clear cause; IVF both treats and diagnoses.
No clear cause; IVF both treats and diagnoses. For unexplained infertility, For unexplained infertility, IVF both treats and diagnoses; PGT-A can help if there are repeated failures.
The chart below shows live-birth rate per embryo transfer from public registries — the single most important number for unexplained infertility, because the cost per baby is the country price multiplied by the cycles you are likely to need.
Chart: live-birth % per transfer — donor-egg success stays ~48% at any age, while own-egg success falls with maternal age (SART/CDC 2019, ESHRE/EIM).
Treatment route and the true cost per baby depend on your age and egg situation — model it in the cost-per-baby calculator. For unexplained infertility we most often compare Czechia, Greece, Spain, Turkey, Poland.
Unexplained infertility means standard tests are normal yet conception has not occurred; IVF is both treatment and diagnosis, often revealing a fertilisation or embryo-quality issue that earlier tests missed. Success follows the standard age curve, and PGT-A or a switch of protocol is considered after repeated unexplained failures. Because there is no single defect to fix, the cost-per-baby calculation — expected cycles at your age times the country price — is the clearest way to plan.
Unexplained infertility means standard tests are normal yet conception has not occurred. IVF is both treatment and diagnosis — it often reveals a fertilisation or embryo-quality issue that earlier tests missed. Success follows the standard age curve (CDC/HFEA). After repeated unexplained failures, PGT-A (embryo screening) or protocol changes are considered. The cost-per-baby calculation (expected cycles at your age × country price) is the clearest planning tool.
IVF success is driven mainly by maternal age and egg type, not by the country you choose. The public registries put own-egg live birth at roughly:
The success figures on this page come from national IVF registries, not clinic marketing. Primary sources:
Compiled and fact-checked by the BabyPath editorial team against the registries above. Per-retrieval (CDC) and per-transfer (HFEA) use different denominators — both are shown so the numbers are not misread. Educational information, not medical advice; outcomes vary by individual and clinic — always consult a licensed fertility specialist.
For unexplained infertility, IVF both treats and diagnoses; PGT-A can help if there are repeated failures.
Own-egg success tracks maternal age — roughly 48% under 35, ~32% at 38–40 and ~8% by 43 — while donor eggs hold near 48% at any age (SART/CDC and ESHRE registries).
We compare Czechia, Greece, Spain, Turkey, Poland on cost per baby, live-birth success and legal eligibility — see the by-destination links below.
Yes — cost per baby is the country price multiplied by the number of cycles you are likely to need, and your diagnosis shifts expected success, so the cheapest sticker price is rarely the cheapest baby.
Often yes, especially under about 38; where ovarian reserve is low, donor eggs can be the cheaper and faster route to a live birth. Model both in the calculator.
The success rates, cost ranges and legal-eligibility rules on this page are compiled from public clinical registries and national guidelines — not opinion. They are planning estimates and do not replace advice from a licensed fertility specialist.
Reviewed against: HFEA (UK), SART/CDC (US), ESHRE/EIM (EU) and NICE CG156.
Compiled and fact-checked by the BabyPath editorial team against the primary sources above · last reviewed 2026-06-12 · BabyPath is an independent cross-border comparison platform, not a clinic. Always consult a licensed clinician before starting treatment.
We compare IVF success rates, prices and laws across 12 countries — using real CDC, HFEA and ESHRE data — to show your true cost per baby, not per cycle. Donor eggs, age 40+, single or same-sex: we show where it's affordable and legal for you.
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