Sperm Freezing

[Sperm freezing or] "Sperm cryopreservation has an important role in an IVF program, not only where the donor sperm is concerned, but also in cases where the male partner has difficulty producing specimens at the appropriate time. In these cases samples may be frozen whenever they become available to ensure that a sample will be available on the day of oocyte retrieval. It may also be of some psychological advantage to patients to have a frozen sample in reserve, thus ensuring that there is less pressure for them to provide a sample on the day of oocyte retrieval."

(Excerpt from: A Textbook of In Vitro Fertilization and Assisted Reproduction, Edited by PR Brinsden and PA Rainsbury. Parthenon Publishing, 1992.)