Hospital General Universitario Gregorio Marañón
Results for Hospital General Universitario Gregorio Marañón in Madrid 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:
- C/O'Donnell, 48 (Hospital Materno-Infantil), Madrid
- Phone:
- 915290047
- Medical director:
- Dirección Médica HGUGM
Registered services: FIV/ICSI · Donación de ovocitos · IAC · IAD
IVF/ICSI with own oocytes
In vitro fertilisation using the patient’s own eggs.
- Fresh cycles
- > 500
- Cycles with frozen embryos
- 100-500
Pregnancy probability per transfer, by the woman’s age
The registry publishes intervals, not exact figures. Scale 0–100%.
Fresh embryos
Frozen embryos
Embryo implantation rate
Probability that a transferred embryo implants in the uterus.
Embryos per transfer
The SEF recommends transferring 1 or 2 embryos whenever possible.
Fresh (394 transfers)
- 1 embryo: 277
- 2 embryos: 117
- 3 embryos: 0
Frozen (450 transfers)
- 1 embryo: 438
- 2 embryos: 12
- 3 embryos: 0
Type of pregnancy achieved
A singleton pregnancy is the best outcome after fertility treatment.
| Pregnancy | With 1 embryo | With 2 embryos | With 3 embryos |
|---|---|---|---|
| Singleton | 100% | 83.3% | Not applicable |
| Twin | 0% | 16.7% | Not applicable |
| Triplet or more | 0% | 0% | Not applicable |
| Pregnancy | With 1 embryo | With 2 embryos | With 3 embryos |
|---|---|---|---|
| Singleton | 98.4% | 100% | Not applicable |
| Twin | 1.6% | 0% | Not applicable |
| Triplet or more | 0% | 0% | Not applicable |
Artificial insemination
Pregnancy rate per cycle in women under 40.
AIH — artificial insemination (partner’s sperm)
The partner’s sperm, prepared and placed in the uterus.
Recorded pregnancies (under 35): 7 singleton · 0 twin · 0 triplet or more
Recorded pregnancies (35–39): 8 singleton · 0 twin · 0 triplet or more
AID — artificial insemination (donor sperm)
Donor sperm placed in the uterus.
Recorded pregnancies (under 35): 11 singleton · 0 twin · 0 triplet or more
Recorded pregnancies (35–39): 18 singleton · 0 twin · 0 triplet or more
Other techniques
Pregnancy probability per transfer (intervals as published by the registry).
| Technique | Fresh embryos | Frozen embryos |
|---|---|---|
| PGT (preimplantation genetic testing) | Not applicable | Not applicable |
| Thawing of own eggs (devitrification) | 35.1 – 88% | 0 – 100% |
| Thawing of donor eggs (devitrification) | Not applicable | Not applicable |
| Sperm donation | 17.3 – 47.5% | 19.8 – 50.5% |
| Embryo donation | — | Not applicable |
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).