what causes leaves to curl upward????

I have a 5 day old seedling with its 1st set of serated leave turning upward just a tad. the new growth is looking good. wondering why the 1st set are curling upward?

In a seedling that young, probably not an issue- they just haven't grown-in all the way yet....
keep an eye on them, pH their water- do not feed them, and don't over water... they'll be fine daddy!!!!

thanks LD, wish i could show ya pic. i think she will be ok tho!!