TTC for a year and 2 miscarriages...just had my vitamin D tested, and it's low. I started researching vitamin D and miscarriage...turns out it could be the problem. It may also not be the issue, but for overall health vitamin D is important. I've also learned that vitamin D plays a significant role in many aspects of your health. If you're having trouble conceiving please ask your doctor to check your vitamin D. It may not be your problem but it's a common problem and not often thought of. Just trying to help people out. Best of luck to all.