What does it mean to create new life when one parent is dying?

Caitlin Gibson writes about the poignant choice to create new life when one parent has a terminal diagnosis:

Ben Boyer can still picture the expression on his wife’s face that night six years ago, as they talked over dinner at their favorite Italian restaurant in London. It had been four years since Xenia Trejo had been diagnosed, at the age of 33, with a malignant brain tumor that doctors said would eventually end her life. But as she sat across the table from Ben that evening, Xenia radiated joy. She felt strong, and after numerous rounds of treatment, her doctors had just told them that Xenia’s tumor was stable enough to do something she had long dreamed of: pursue a pregnancy. Now Xenia was asking Ben, What do you think? Should we try?

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These are distinctly modern stories. For couples who confronted grim diagnoses before the turn of the millennium, the option to preserve their fertility was much harder to find and less likely to succeed. But the ability to freeze and test embryos improved dramatically in the early 2000s, bringing with it complex existential questions. What would it mean to have a baby in these circumstances for the parent who would die? For the parent who would live? For their child?