Hi Jen & Kay:

I don't know if this is hokey or not, but I found this link about body fat and amenorrhea that was pretty interesting to read.

http://www.bodyfatguide.com/Amenorrhea.htm

It's odd that some women are OK with LBF but others aren't. Genetics would have to play a large part in it, don't you think? Having LBF as a teenager/early adult would be OK as an adult, but having higher BF as a kid and reducing BF too low as an adult would cause problems. Makes me wonder.

I think more research and understanding into the role of leptin, the hormone that is secreted by our fat cells, will answer many of these questions.

Wanda