The technology of freezing sperm and ova (eggs) is often used to provide donor sperm or eggs for the treatment of infertility, although people often choose to store their own sperm, eggs, or fertilized embryos as a backup in case they should want to produce children in the future.
This category is for sites which discuss the technology of frozen storage of human or animal sperm, ova (eggs), and embryos. Sites for clinics and services are not listed here, and belong in Health/Reproductive_Health/Infertility/Clinics_and_Services or Health/Reproductive_Health/Infertility/Donor_Services/