Dear Maria, thank you for your question, which I feel more than happy to answear. All donors in our centre are submited in genetic screening regarding chromosomal anomalies (karyotype) and also cystic fibrosis (?F 508 mutation). Furthermore following the letter of the law we screen about sickle cell disease, thallasaimia and also HIV, HCV,HBsAg, syphilis, ABO/Rhesus. The recipient couple are entitled to know this information before they commence any trial on our donation programme. Please feel free to contact us for any further information you might need.