Clínica Tambre, Madrid, Spain

Clínica Tambre has more than 45 years of experience in reproductive medicine. Since its founding in 1978, the clinic has helped over 10,000 families have children. It is one of Spain’s most established fertility centers. The founder, Dr. Pedro Caballero Peregrín, also helped draft the country’s first assisted reproduction law. Tambre’s results are independently audited by the Spanish Fertility Society (SEF) and external certifiers. This ensures transparency, accuracy, and quality control. Success Rates and Patient Outcomes According to SEF-verified data, about 70% of patients achieve pregnancy after one embryo transfer using their own eggs. This rate is well above the national average. For women over 40, advanced embryo genetic testing (PGT-A) increases success rates. With this approach, around 76% of transfers result in pregnancy. With donor eggs, the success rate per transfer is about 67%. After three attempts, over 90% of patients achieve pregnancy. Tambre also follows a single-embryo transfer policy. This reduces the chance of multiple pregnancies. Their multiple birth rate is under 1%, making treatment safer for both parent and child. Advanced Technologies and Treatments Tambre’s embryology lab is equipped with state-of-the-art technology. These tools support strong outcomes, even in complex fertility cases. GERI® Time-Lapse Incubators – continuous embryo monitoring in a stable environment without disturbance. Preimplantation Genetic Testing (PGT) – checks embryos for chromosomal issues before transfer, lowering miscarriage risk. Specialised Diagnostic Tools – including COMET (sperm DNA analysis), KIR/HLA-C matching, and ERA/EMMA/ALICE endometrial tests. Reproductive Immunology Unit – custom treatment plans for patients with repeated IVF failures or miscarriages. ZyMot Microfluidic Chips – select the healthiest sperm for ICSI to improve fertilisation rates. RI Witness™ Tracking System – electronic monitoring of all samples, eliminating any risk of mix-ups. These technologies combine with expert medical care to deliver a highly personalised IVF experience. Donor Program and Egg Donation Tambre runs one of Spain’s most established egg donation programs. Spanish law ensures anonymity, medical safety, and donor age limits under 35. All donors go through strict health and psychological screening, including genetic testing. Madrid’s diverse population allows the clinic to provide a wide range of donor ethnicities. This benefits patients seeking closer genetic matches. There are no waiting lists for egg or sperm donors. Treatments can start immediately. Tambre also offers flexible donor IVF packages. Some include guaranteed numbers of high-quality embryos. Success rates for donor IVF are consistently above European averages. Many patients who struggled elsewhere have achieved pregnancy at Tambre.