A method of preserving fertility of a patient undergoing a treatment expected to cause sterility, the method comprising;
- (a) removing at least one whole ovary including vasculature from the patient;
- (b) freezing said at least one whole ovary including vasculature;
- (c) conducting the treatment and waiting for an effect thereof to subside;
- (d) thawing said at least one whole ovary including vasculature so that at least a portion of cells contained therein resume biological activity;
- and
- (e) introducing at least one whole ovary including vasculature into the patient so that a blood vessel present in said at least one ovary is supplied with blood by a vasculature system belonging to the patient.