I've just found out that I'm 5 weeks pregnant at 46!!!. I'm delighted and so is my husband but I'm absolutely shocked to be pregnant at all (thought it was menopause) and very worried about the miscarriage rates for this age group, which I've read is as high as 50%. I don't smoke or drink, I watch what I eat and am taking preg vitamins. All of my blood tests were great and this is baby number 7. Others are between 27 - 6 yrs. What can I do to minimise the risk of miscarriage please.