In vitro fertilization (IVF) procedures allow couples in California and around the country who thought that they could never have children to enjoy the pleasures of parenthood. Fertilized embryos can even be frozen and stored for use later. The IVF facilities that offer fertility preservation services ask couples to sign documents that include cryopreservation and disposition provisions that state what should be done with frozen embryos in a divorce, but these agreements are often challenged in court.