Note: We do not actually know that any doctor administered fertility drugs or provided any form of fertility treatment to this woman. If she worked at a fertility clinic (even as a cleaning lady), she could easily have stolen drugs, and if she took quantities that are normally intended only for IVF (IOW that can cause large numbers of eggs to mature simultaneously), and then got pregnant either naturally or by self-insemination with some donor’s sperm, she could have pulled off this bizarre stunt without anyone’s knowledge.
That’s possible; we’ll know soon because an investigation is in progress.