Uhmm. I've never heard of that. You can use vitamin c pills within the first month. If you take vitamin c supplements (without rosehips or riboflavin) once an hour (three before bed) you will start your period within 3-4 days.

Grain Products: Enriched white bread, buns, bagels, english muffins plain cereals e.g. Cheerios, Cornflakes, Cream of Wheat, Rice Krispies, Special K arrowroots cookies, social tea biscuits, soda crackers, plain melba toast white rice, pasta (e.g. Macaroni, spaghetti, noodles) Fruits: Fruit juices except prune juice applesauce, apricots, banana (1/2), cantaloupe, canned fruit cocktail, grapes, honeydew melon, … Read more

You need to know the height of the prism to reach this answer.