If it is just a normal check up then they would not have any way of knowing if you started your period or not.
"Mitosis is a division in which the daughter cells formed are same as their parent cells.In humans all sorts of cells undergo this type of division Except cells of gametes(reproductive system).For example,mitosis for growth of body,for hair growth,tissue cells when repairing is required etc."
I hope all is well, and you end up passing!
Science must be used to figure out the correct weight, length, and what material it is made out of to be the most successful at its job. Technology must be used to make sure that the calculations are correct and to use a 3d printer or something like that to make it, that or robots/tools.