When our daughter, Aaliyah, was diagnosed with Ewing’s sarcoma at age 9 in November 2016, my husband and I were singularly focused on her survival. But as her treatment plan unfolded, we soon realized we needed to address another issue that never would have otherwise been on our radar: her fertility.

Our daughter’s Ewing’s sarcoma diagnosis

After the initial biopsy of the mass in Aaliyah’s abdomen and pelvis, her oncologist...