Freezing eggs can “miraculously” preserve a woman’s ability to have a baby.

A diagnosis of cancer is life-altering, and one fear it may bring for women of childbearing age is that treatment could leave them unable to have children. Indeed, chemotherapy sometimes has that result. But pre-treatment oocyte cryopreservation— egg freezing—can often preserve a woman’s eggs for later use in in vitro fertilization (IVF). And this technology, [...]