Quote Originally Posted by OakLeaf View Post
I don't know much about it, but I thought that happened when your body fat got too low, and it carries a risk of osteoporosis and other health problems. Are you sure you're eating enough? Have you had your body fat measured by an experienced practitioner? +1 on a second opinion.
I agree with Oak. I've only experienced this once, and for me it was a sign of extreme stress, so I would be worried if it happened again. If it turns out that you're fine and healthy, all the better.

Breastfeeding is another thing again, amenorrhea then is normal and due to hormones.