What is the standard relative humidity range for storing hatching eggs before incubation?

Storing fertile hatching eggs requires careful climate control to preserve embryo viability. A hatching egg is a living biological system. If the relative humidity in the egg storage room is too low (under 65%), water evaporates rapidly through the microscopic pores of the calcium carbonate shell, causing the air cell to expand abnormally and the inner albumen to dry out, which leads to high embryonic mortality during the first week of incubation. Conversely, humidity above 85% must be avoided to prevent condensation and mold growth on the cuticle, which introduces pathogens. Hatcheries evaluate weight loss and hatchability closely. Hatchery owners can post demands for high-density fertile eggs on Murghi Mandi, source specialized humidifiers and egg coolers on Poultry Plaza, and monitor chick rates on Poultry Rates.