Donor sperm refers to sperm that is provided by a male donor for the purpose of assisted reproduction. This sperm is typically collected, screened for diseases, and stored in sperm banks. It can be used by individuals or couples who may have difficulty conceiving naturally, including single women, same-sex couples, and heterosexual couples facing infertility issues. The process of using donor sperm often involves methods like intrauterine insemination (IUI) or in vitro fertilization (IVF). Donors may remain anonymous or choose to be known to the recipient. Legal and ethical considerations are important in the selection and use of donor sperm.