This is additive color. Red, green and blue are the primary colors of white light. All three colors will result in white, the absence of all three will produce black. When two primary colors of light are added together, you get a color that is brighter than either of its components.
MYTH: A blood spot inside the egg means the egg is fertile. FACT: A blood spot inside an egg can occur at various points in a hen's reproductive system as a result of a blood vessel rupturing. It can be the result of a genetic predisposition, a vitamin A deficiency, or a random event.
Charting Your Fertility. Use this calculator to predict the timing of your ovulation and most fertile days of the month. By determining when you are most fertile, you can increase your chances of getting pregnant. To use the calculator, just enter the first day of your last period and the length of your menstrual cycle in days.