Clinica Zuatzu
Results for Clinica Zuatzu in Guipúzcoa from Spain’s official Ministry of Health registry: reporting is mandatory, and more than 10% of centres are audited each year by an independent body.
- Address:
- Calle Zuatzu, 9, 20018 San Sebastián (Guipúzcoa)
- Phone:
- 943249549
- Website:
- www.clinicazuatzu.com
- Medical director:
- Dr.M.Garcia Giménez
IVF/ICSI with own oocytes
In vitro fertilisation using the patient’s own eggs.
Pregnancy probability per transfer, by the woman’s age
Out of every 100 embryo transfers performed at this centre, how many resulted in a pregnancy, by the woman’s age.
- This clinic (published interval)
- National average
Fresh embryos
Frozen embryos
Treatment year: 2023.
Cycles started that year: between 100 and 500 (fresh) (the registry publishes bands, not exact figures).
Why is this measure important?
It is the figure closest to the question “what are my chances?”: the outcome of each transfer, in your age group. The woman’s age is the factor that weighs most on the result — which is why we never show a single overall rate.
Detailed explanation
The registry publishes every rate as an interval: the floor and the ceiling of the centre’s estimate. A wide interval usually means few cycles (more chance at play); a narrow one, more activity. Important: the Spanish registry publishes pregnancies, not live births — some pregnancies do not reach term, so this is not a birth rate. And each clinic treats different patients: comparing raw figures between centres can be misleading.
Embryo implantation rate
Out of every 100 embryos transferred at this centre, how many implanted in the uterus.
- This clinic (published interval)
- National average
Treatment year: 2023.
Why is this measure important?
It measures the outcome embryo by embryo — the finest denominator the registry publishes: it lets you compare centres that transfer a different number of embryos per attempt.
Detailed explanation
It is calculated per embryo transferred, not per transfer: if two embryos are transferred and one implants, the transfer counts as a pregnancy, but implantation is 50%. The registry publishes it as an interval, without an age breakdown. It measures implantation, not a full-term pregnancy or a birth.
Egg donation
In vitro fertilisation with eggs provided by a donor.
Pregnancy probability per transfer, by the woman’s age
Out of every 100 embryo transfers performed at this centre, how many resulted in a pregnancy, by the woman’s age.
- This clinic (published interval)
- National average
Fresh embryos
Frozen embryos
Treatment year: 2023.
Why is this measure important?
In egg donation the decisive factor is the donor’s age, not the recipient’s: that is why its rates are higher and more stable than IVF with own eggs, and why it is shown as a separate section — mixing them would be misleading.
Detailed explanation
Same measure as IVF with own oocytes (pregnancy per transfer, published as an interval), with eggs provided by a donor. “Fresh” and “frozen” refer to the embryos transferred. Here too the registry publishes pregnancies, not births.
Embryo implantation rate
Out of every 100 embryos transferred at this centre, how many implanted in the uterus.
- This clinic (published interval)
- National average
Treatment year: 2023.
Why is this measure important?
It measures the outcome embryo by embryo — the finest denominator the registry publishes: it lets you compare centres that transfer a different number of embryos per attempt.
Detailed explanation
It is calculated per embryo transferred, not per transfer: if two embryos are transferred and one implants, the transfer counts as a pregnancy, but implantation is 50%. The registry publishes it as an interval, without an age breakdown. It measures implantation, not a full-term pregnancy or a birth.
Artificial insemination
Pregnancy probability per cycle started
Pregnancy rate per cycle in women under 40.
- This clinic (published interval)
- National average
AIH — artificial insemination (partner’s sperm)
The partner’s sperm, prepared and placed in the uterus.
AID — artificial insemination (donor sperm)
Donor sperm placed in the uterus.
Treatment year: 2023.
Why is this measure important?
Insemination is the least complex technique and also the one with the lowest probability per attempt: the measure is pregnancy per cycle started, not per transfer, because insemination involves no embryo transfer.
Detailed explanation
AIH means insemination with the partner’s sperm; AID, with donor sperm. The registry publishes the pregnancy percentage per cycle as an interval, stratified by the woman’s age (up to 2014, a single “under 40” band). These are recorded pregnancies, not births.
Other techniques
Pregnancy probability per transfer (intervals as published by the registry).
| Technique | Fresh embryos | Frozen embryos |
|---|---|---|
| PGT (preimplantation genetic testing) | Not applicable | 36.8 – 68.5% |
| Thawing of own eggs (devitrification) | Not applicable | 0 – 100% |
| Thawing of donor eggs (devitrification) | 32.6 – 100% | 100 – 100% |
| Sperm donation | 32.6 – 100% | 14.1 – 55.9% |
| Embryo donation | — | 21.6 – 55.9% |
Treatment year: 2023.
Why is this measure important?
These techniques do not fit the sections above, but the registry publishes their results too: they matter if your treatment involves PGT, vitrified eggs, or embryo or sperm donation.
Detailed explanation
Each row is the pregnancy probability per transfer for that technique, as published by the registry (intervals, never reduced to a single number). PGT is published as a rate per transfer — not as the share of cycles using PGT.
IVF/ICSI with own oocytes
Activity volume
This centre recorded between 100 and 500 IVF/ICSI with own oocytes cycles started in 2023 (fresh).
The registry publishes cycles started as bands, not exact figures — and that is how they are shown.
Embryos per transfer
The SEF recommends transferring 1 or 2 embryos whenever possible.
Fresh
- 1 embryo: 39
- 2 embryos: 0
- 3 embryos: 0
Frozen
- 1 embryo: 84
- 2 embryos: 0
- 3 embryos: 0
Type of pregnancy achieved
A singleton pregnancy is the best outcome after fertility treatment. Composition of recorded pregnancies: these are pregnancies, not deliveries.
Fresh transfers · with 1 embryo
- Singleton: 100%
- Twin: 0%
- Triplet or more: 0%
Frozen embryo transfers · with 1 embryo
- Singleton: 100%
- Twin: 0%
- Triplet or more: 0%
Egg donation
Embryos per transfer
The SEF recommends transferring 1 or 2 embryos whenever possible.
Fresh
- 1 embryo: 11
- 2 embryos: 0
- 3 embryos: 0
Frozen
- 1 embryo: 50
- 2 embryos: 2
- 3 embryos: 0
Type of pregnancy achieved
A singleton pregnancy is the best outcome after fertility treatment. Composition of recorded pregnancies: these are pregnancies, not deliveries.
Fresh transfers · with 1 embryo
- Singleton: 100%
- Twin: 0%
- Triplet or more: 0%
Frozen embryo transfers · with 1 embryo
- Singleton: 100%
- Twin: 0%
- Triplet or more: 0%
Frozen embryo transfers · with 2 embryos
- Singleton: 50%
- Twin: 50%
- Triplet or more: 0%
Artificial insemination
Composition of recorded pregnancies: these are pregnancies, not deliveries.
AIH — artificial insemination (partner’s sperm) · under 35
- singleton: 4
- twin: 0
- triplet or more: 0
AIH — artificial insemination (partner’s sperm) · 35–39
- singleton: 1
- twin: 0
- triplet or more: 0
AID — artificial insemination (donor sperm) · under 35
- singleton: 3
- twin: 0
- triplet or more: 0
AID — artificial insemination (donor sperm) · 35–39
- singleton: 3
- twin: 0
- triplet or more: 0
How this centre has changed
The registry publishes 10 years of data for this centre, from 2014 to 2023. Cycles started: 100-500 at the start of the series, 100-500 in the most recent year with data. The band is what the registry publishes; never an exact figure.
Services registered in the SEF census
- FIV/ICSI
- Donación de ovocitos
- PGT
- IAC
- IAD
The registry census lists the services each centre declares; it does not publish the ones it does not offer, so nothing here is marked as “not available”.
Source: “Registro Nacional de Actividad 2023-Registro SEF” (Spanish National ART Activity Registry) — registrosef.com, retrieved 31 July 2026. 2023 activity data, the most recent published by the registry (it publishes with a ~2-year lag).
National average: “Registro Nacional de Actividad 2023-Registro SEF”, the registry’s national statistical report — retrieved 4 August 2026.