IVF for Female same-sex couples

Donor sperm + optionally ROPA (one provides eggs, one carries). Legal in Spain, Portugal, UK, Denmark.

The realistic picture for female same-sex couples

Donor sperm + optionally ROPA (one provides eggs, one carries). Legal in Spain, Portugal, UK, Denmark.

Female couples' routes: you can use donor sperm with both partners (each can carry, or one carries with both genetic links), or ROPA (one provides eggs, one carries the same embryo). Spain, Portugal, the UK, and Denmark all permit both. Cost per baby depends on whether you do fresh or frozen transfers and how many partners' biological genes matter to your family.

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.

What the registries actually show

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:

• United States (CDC ART, 2021): live birth per egg retrieval with own eggs — under 35 49.7%, 35-37 36.3%, 38-40 23.1%, over 40 7.7%.
• United Kingdom (HFEA, 2023): live birth per embryo transferred — ages 18-34 about 35%, 43-44 about 5%; national average about 25%.
• Donor eggs (ESHRE/EIM): about 48% per transfer, broadly independent of the recipient's age — the single biggest lever after 40.

Sources & evidence

The success figures on this page come from national IVF registries, not clinic marketing. Primary sources:

• CDC ART 2021 National Summary (US) — US live-birth per egg retrieval, own eggs: under 35 49.7%, 35-37 36.3%, 38-40 23.1%, over 40 7.7%.
• HFEA Fertility Treatment 2023: trends & figures (UK) — UK live-birth per embryo transferred, own eggs: ages 18-34 ~35%, 43-44 ~5%; national average ~25%; ~1 in 5 births used donor eggs/sperm.
• HFEA Fertility Treatment 2021: preliminary trends & figures — UK birth rate per embryo transferred: 40-42 ~10%, 43-50 ~4% (2021).
• ESHRE / EIM - European IVF monitoring — Donor-egg live-birth ~48% per transfer, broadly independent of recipient age.
• Cumulative live-birth with own eggs - PMC10591412 — Cumulative live-birth with own eggs plateaus with fewer cycles for each year of age over 42.
• NICE CG156 - Fertility problems (UK) — UK clinical guideline on IVF access criteria and number of funded cycles.

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.