Sperm freezing is an established technique and has resulted in many normal livebirths. However, this presents problems, particularly for young boys, who can not produce a semen sample. For this group of patients tiny pieces of their testicular tissues can be frozen for later use. Sperm retrieved from testicular tissue can then be used to fertilize eggs by ICSI technique . Attempts have been made but as yet testicular transplant have yet to produce sperm.
Experts believe that it is feasible.
There have been concerns that reimplanting tissues taken from a cancer patient prior to treatment could results in reimplantation of cancer cells, and to the return of the disease. For women with cancer, the clinic may offer three options depending on many factors such as the woman's age, marital status and the length of time available before commencing chemotherapy or radiotherapy. Freeze tiny pieces of ovarian tissue. This is the only option for patients who have not yet started menstruating and in women who have got only a short period of time before commencing their cancer treatment. Freezing embryos is a well-established technique and has resulted in many normal livebirths.