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Modern vitrification techniques have substantially improved oocyte cryosurvival and fertilization outcomes, making planned and medically indicated oocyte cryopreservation a practical fertility-preservation option. Prospective studies and meta-analyses show that vitrified mature oocytes can yield clinical outcomes approaching those of fresh oocytes in appropriately selected patients. For reproductive medicine, the most important determinant is still age at the time of cryopreservation because oocyte number and chromosomal competence decline with advancing age. Counseling should therefore be individualized and should avoid promising a guaranteed future live birth. In oncofertility, timing relative to cancer therapy and the feasibility of controlled ovarian stimulation become critical. The topic also highlights the importance of discussing realistic expected yield, cumulative probability of live birth and alternative preservation strategies when ovarian stimulation is not feasible.
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Modern vitrification techniques have substantially improved oocyte cryosurvival and fertilization outcomes, making planned and medically indicated oocyte cryopreservation a practical fertility-preservation option. Prospective studies and meta-analyses show that vitrified mature oocytes can yield clinical outcomes approaching those of fresh oocytes in appropriately selected patients. For reproductive medicine, the most important determinant is still age at the time of cryopreservation because oocyte number and chromosomal competence decline with advancing age. Counseling should therefore be individualized and should avoid promising a guaranteed future live birth. In oncofertility, timing relative to cancer therapy and the feasibility of controlled ovarian stimulation become critical. The topic also highlights the importance of discussing realistic expected yield, cumulative probability of live birth and alternative preservation strategies when ovarian stimulation is not feasible.
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