Hi Roxy,
I have found this to be controversial among doctors themselves. Dr. O and Dr. Mayer deem it unnecessary to go off hormones. They are confident enough in their anesthesiologists to manage the threat of blood clots arising from estrogen. Other doctors, such as Dr. Beck and now apparently Dr. Spiegel follow a more restrictive regimen. There's no use arguing with them over this -- do it their way, as they have their reasons; or chose a different doctor. Hugs, Beatrice