India, June 16 -- For countless couples struggling with infertility, IVF represents hope, trust and the chance to build a family. But a growing number of cases from around the world are raising uncomfortable questions about what happens when that trust is broken.

The latest case to attract attention comes from Gurugram, where a couple reportedly discovered through DNA testing that their IVF-conceived twins shared no genetic link with them. The revelation has triggered legal action and renewed concerns about the safeguards followed by fertility clinics during embryo handling and implantation.

While such incidents remain rare compared to the large number of successful IVF births every year, similar cases have surfaced in different countr...