The only issue I forsee is with the potential inability to have children late in life.

A friend of mine started her menses earlier in life and had them more frequently than I did. When she hit her mid to late 30s, she struggled having children because she didn't have a lot of eggs left. The ones that were available just weren't producing results. She ended up using an egg donor.

I, on the other hand, started late. I believe I was 14 or 15yrs old. I am now 44 years old with a 3yr old and a 1yr old. I got pregnant 4times (with 2 losses) in my 40s.

We are born with a preset number of eggs. When we menstruate, we release one of those eggs each month. If we start mensing at 8yrs old, the egg pool will deplete itself earlier in life.. and I suppose perimenopause kicks in.

So, I guess I'd start family planning sooner in life or have my eggs frozen if a child starts mensing at a really young age.

Please correct me if I'm wrong.