Icon Medical Oncologist Dr Lee Guek Eng recently answered questions on what young women should consider when diagnosed with breast cancer. Fertility preservation is among these concerns. Dr Lee says the three main forms of fertility preservation include embryo cryopreservation, oocyte (egg) cryopreservation and ovarian tissue preservation. Read more about these procedures below. If you have fertility concerns and have been diagnosed with cancer it is important to talk to your oncologist who will be able to refer you to a fertility specialist to discuss your options before starting cancer treatment.