Bednobs, you can use the ovulation kits you get now rather that the whole temperature thing - there's also the way they figure out the rhythm method which has something to do with the thickness of your 'fluids', but I think the kits are pretty accurate. As for your age, my former boss got pregnant for the first time at 37, and she went on to have 3 sons in total after that age, so you're not old! I would say get the op out of the way, and concentrate on getting over your loss and planning for the future in the meantime - redcrx, makes some very good points about your meds etc too. Whatever you choose to do, good luck x