How do i tell my children i have stage 4 ovarian cancer?

Be honest.: It's important to be honest with them. Cancer is understandably a shocking and emotionally taxing thing for everyone involved, so keeping everyone on the same page will allow you and your loved ones to support each other through difficult times. Keep them, as well as yourself, informed of all the amazing resources out there to help patients and their families cope with their situation.

Depends on their age: Cancer is a difficult subject for most people, patients and loved ones alike. The age (maturity) of one's children determines what and how much to tell them. The american cancer society has some great resources available to assist cancer patients with this process: http://www.Cancer.Org/treatment/understandingyourdiagnosis/talkingaboutcancer/talking-with-friends-and-relatives-about-your-cancer.

Depends on the age: Depending on the age you let them know mommy is sick. You may consider who and where you are going to tell them, as you will need a great deal of support as well, be honest and candid, use language that they can understand, let them know that it is not their fault, nothing they have done. Assure them mommy and her docs are doing everything to make you better, let them help you. They need security.