Childhood Cancer Risk After Assisted Reproductive Technology.

Assisted reproductive technology, especially frozen embryo transfer and intracytoplasmic sperm injection, is linked to increased childhood cancer risk in Danish children.

• Why it matters: Understanding the potential cancer risks associated with ART is crucial for informing clinical decisions and parental choices, as the safety of ART procedures remains uncertain.
• What they did: A nationwide Danish cohort study analyzed 1,086,136 live-born children from 1996 to 2012, with follow-up through 2023, comparing cancer incidence among children conceived via ART and non-ART methods using hazard ratios.
• The result: Children conceived with frozen embryo transfer and intracytoplasmic sperm injection showed higher hazard ratios for cancer (HR, 2.18 and 1.48 respectively), with specific associations to leukemia, lymphomas, and soft tissue sarcomas, though absolute risks remained low.