It transforms glucose (which is a simple sugar) into starch. The process of doing this is called polymerization. Amyloplast stores starch grains within their stretched membranes. They also can transform starch into sugar when the plant needs energy.

Knowing from experience stress will not stop your period it will slow it down and tend to go off track but don't worry it happens to every woman

It all depends sometimes you can have a period twice a month because of too much intercourse. The reason why is because when you get together with a man a lot, it will differ your regular period schedule because it is trying to regulate the times when you have your period.