"Double yellow egg" is how it formed?

1, the physiological reasons: more common in young hens, the Department due to excessive secretion of reproductive function due to strong, follicle-stimulating hormone and hormone to induce ovulation.

   2, genetic reasons: to become one of the double yellow high stability genes, generation to generation, such as hybrid 288 hens double yellow star was 2.77%; double yellow rate of 1% to 14%. Double yellow eggs are under the above two reasons, the approximate size of two egg yolks.

  3 pathological reasons: usually caused by sudden frightened, bolted flying, the sudden increase in abdominal pressure, crushed "follicle seam marks", resulting in two or more of the yolk removed due to two or more egg yolk size disparity.