Would the fetus have lived had the questioner undergone the X-rays requested by the doctor?

If the mother did not undergo the requested X-ray, there is no blame upon her, and this is not considered a cause for the fetus's death. This is because seeking medical treatment is not obligatory; rather, it is recommended or permissible. Lifespans are predetermined and known, and no soul dies before its appointed time. The fetus died at its destined time. Therefore, there is no sin upon the mother.