The nurse should be kind and remind the parents not to put blame on themselves and the things in which they cannot control.
I would say for because everything else is important <span />
I think the answer is: most likely high in saturated fat
Some of the reasons can be:
If you're a pre-teen or a teenager who has only started menstruating, you may find that it takes a while for your period to settle in and become regular.
I couldn't think of anything else, but hope this helped enough!
To find the best answer, ask your mom!
~Aurora