Hi, that's hard. I think they are taking a conservative approach and that's not all bad. Invasive procedures can cause scar tissue. Has your wife had children? Endometrial cancer is typically very slow growing. Meaning, a six week wait to assess period likely would not create any danger for her of advancing the cancer but allows them to have a better idea. They are suggesting removing the fibroid or doing a biopsy? https://www.medicinenet.com/uterine_endometrial_cancer_symptoms_and_signs/symptoms.htm This article you can copy and paste has a list of symptoms. The issue is that so many of these symptoms can overlap. I've had an ovarian cyst that caused these, for example. It was a simple cyst that passed on its own. But boy, it was painful. Anyway, if she trusts her doctor, then I'd follow their advice and directions but she can always get a second opinion.