How does ovarian tissue cryopreservation differ for children and adults?

So the technology for children and young adult females is identical. And in fact the ovary contains all the follicles. And again, the follicles are the functional unit that create the eggs that can be fertilized. All of these follicles are present in a woman’s ovary at birth.

And in fact, all women are born with about a million follicles. And these follicles then are developing over the lifespan of the woman, the fertile lifespan of a woman, until about 51-and–a-half years, the time of menopause. So the follicles are parsed out over time. So for a girl with a cancer diagnosis where her fertility will be threatened, she actually has more follicles available to her than a 39-year-old woman who has had many of these follicles depleted. So for adult women, you take out the ovary, there are follicles still available, those are cryopreserved. For a girl with cancer, you do exactly the same thing, but there are more follicles available within that particular ovary.