Mesa del Castillo Hospital - Fertility Unit This is the area of medicine which deals with all aspects of human infertility and sterility. The objective is to prevent and treat issues in human reproductive function, both in men and women. There are many diagnostic procedures and treatments on offer, including IUI (intra-uterine insemination), IVF (in vitro fertilisation) and egg and sperm donation. Fertility assessment. Semen analysis, semen functional tests, semen DNA fragmentation tests. Testicular biopsy. Sperm freezing and storage. Reproductive hormones analysis. Diagnostic hysteroscopy and surgery Diagnostic laparoscopy and surgery. IUI, either with partner or donor sperm. IVF. ICSI sperm micro-injection. Egg donation. Egg and embryo freezing. Pre-implantation genetic diagnosis (PGD).